You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Will you please book a flight to Houston, HOU?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I planned to travel on 05/16. I intend to return on 05/18.

ASSISTANT: May I know your source point?

USER: Phoenix, PHX is the source, willing to start to participate in water rafting.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need it.

ASSISTANT: We are glad to say that, we found an airline: UA, flight number: 1002 and price is 200.

USER: Ok, you can proceed to book.

ASSISTANT: Your good name please.

USER: I am Thomas Clark.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.