Here's a sample of the data you can work with on the MessageBird platform for Checkouts. Keep in mind that the availability of some fields in this data set depends on how your store is configured regarding checkouts, accounts and information you collect from customers. You can refer to this sample to understand the possibilities on how to improve your conditions and data collection from customers to make sure mandatory information—like the users’ phone numbers—is collected. 

Sample from Shopify:

{
  "id": 981820079255243537,
  "token": "123123123",
  "cart_token": "eeafa272cebfd4b22385bc4b645e762c",
  "email": "example@email.com",
  "gateway": null,
  "buyer_accepts_marketing": false,
  "created_at": "2020-03-04T12:38:08-05:00",
  "updated_at": "2020-03-04T12:38:08-05:00",
  "landing_site": null,
  "note": null,
  "note_attributes": [
  ],
  "referring_site": null,
  "shipping_lines": [
  ],
  "taxes_included": false,
  "total_weight": 907,
  "currency": "USD",
  "completed_at": null,
  "closed_at": null,
  "user_id": null,
  "location_id": null,
  "source_identifier": null,
  "source_url": null,
  "device_id": null,
  "phone": null,
  "customer_locale": null,
  "line_items": [
    {
      "applied_discounts": [
      ],
      "key": "4d50cb97a8bb64255d7882e313a5c8d3",
      "destination_location_id": 938998181,
      "fulfillment_service": "manual",
      "gift_card": false,
      "grams": 454,
      "origin_location_id": 938998180,
      "product_id": 632910392,
      "properties": null,
      "quantity": 1,
      "requires_shipping": true,
      "sku": "IPOD2008PINK",
      "tax_lines": [
      ],
      "taxable": true,
      "title": "IPod Nano - 8GB",
      "variant_id": null,
      "variant_title": "",
      "variant_price": null,
      "vendor": "Apple",
      "user_id": null,
      "unit_price_measurement": null,
      "country_hs_codes": [
      ],
      "country_code_of_origin": null,
      "province_code_of_origin": null,
      "harmonized_system_code": null,
      "compare_at_price": null,
      "line_price": "199.00",
      "price": "199.00"
    },
    {
      "applied_discounts": [
      ],
      "key": "4d50cb97a8bb64255d7882e313a5c8d3",
      "destination_location_id": 938998181,
      "fulfillment_service": "manual",
      "gift_card": false,
      "grams": 454,
      "origin_location_id": 938998180,
      "product_id": 632910392,
      "properties": null,
      "quantity": 1,
      "requires_shipping": true,
      "sku": "IPOD2008PINK",
      "tax_lines": [
      ],
      "taxable": true,
      "title": "IPod Nano - 8GB",
      "variant_id": null,
      "variant_title": "",
      "variant_price": null,
      "vendor": "Apple",
      "user_id": null,
      "unit_price_measurement": null,
      "country_hs_codes": [
      ],
      "country_code_of_origin": null,
      "province_code_of_origin": null,
      "harmonized_system_code": null,
      "compare_at_price": null,
      "line_price": "199.00",
      "price": "199.00"
    }
  ],
  "name": "#981820079255243537",
  "source": null,
  "abandoned_checkout_url": "https:\/\/checkout.local\/690933842\/checkouts\/123123123\/recover?key=example-secret-token",
  "discount_codes": [
  ],
  "tax_lines": [
  ],
  "source_name": "web",
  "presentment_currency": "USD",
  "total_discounts": "0.00",
  "total_line_items_price": "398.00",
  "total_price": "398.00",
  "total_tax": "0.00",
  "subtotal_price": "398.00",
  "billing_address": {
    "first_name": "Bob",
    "address1": "123 Billing Street",
    "phone": "555-555-BILL",
    "city": "Billtown",
    "zip": "K2P0B0",
    "province": "Kentucky",
    "country": "United States",
    "last_name": "Biller",
    "address2": null,
    "company": "My Company",
    "latitude": null,
    "longitude": null,
    "name": "Bob Biller",
    "country_code": "US",
    "province_code": "KY"
  },
  "shipping_address": {
    "first_name": "Steve",
    "address1": "123 Shipping Street",
    "phone": "555-555-SHIP",
    "city": "Shippington",
    "zip": "K2P0S0",
    "province": "Kentucky",
    "country": "United States",
    "last_name": "Shipper",
    "address2": null,
    "company": "Shipping Company",
    "latitude": null,
    "longitude": null,
    "name": "Steve Shipper",
    "country_code": "US",
    "province_code": "KY"
  },
  "customer": {
    "id": 603851970716743426,
    "email": "john@test.com",
    "accepts_marketing": false,
    "created_at": null,
    "updated_at": null,
    "first_name": "John",
    "last_name": "Smith",
    "orders_count": 0,
    "state": "disabled",
    "total_spent": "0.00",
    "last_order_id": null,
    "note": null,
    "verified_email": true,
    "multipass_identifier": null,
    "tax_exempt": false,
    "phone": null,
    "tags": "",
    "last_order_name": null,
    "currency": "USD",
    "accepts_marketing_updated_at": null,
    "marketing_opt_in_level": null,
    "admin_graphql_api_id": "gid:\/\/shopify\/Customer\/603851970716743426",
    "default_address": {
      "id": 1234567890,
      "customer_id": 603851970716743426,
      "first_name": null,
      "last_name": null,
      "company": null,
      "address1": "123 Elm St.",
      "address2": null,
      "city": "Ottawa",
      "province": "Ontario",
      "country": "Canada",
      "zip": "K2H7A8",
      "phone": "123-123-1234",
      "name": "",
      "province_code": "ON",
      "country_code": "CA",
      "country_name": "Canada",
      "default": true
    }
  }
}