You are a flight assistant. 
 USER: Hi, I am Joshua Campbell.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from Las Vegas, LAS?

ASSISTANT: Sure, may I know your journey dates?

USER: I would like to start on 12/29 and return on 12/31.

ASSISTANT: Kindly,mention your airport codes.

USER: I want to reach to Houston, IAH.

ASSISTANT: You have a flight with airline AA and flight  number is 1004 with 1 connection and price is 100.

USER: Proceed to book.

ASSISTANT: Your reservation is done.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us, have a nice day.