Which is the better user journey, 

A:

1. Search for an available booking and select it
2. Lookup a customer in the database to see if they exist
3. Then create a new customer account if needed
4. Wait for the user to verify their email account
5. Refresh the page
6. Go back and find the booking again to re-select it
7. Proceed to a checkout screen

OR

B:

1. Search for an available booking and select it
2. Enter an email address, which will either:

   1. Automatically use the existing clients details, or
   2. Create a new client with that email address

3. Proceed to a checkout screen