You are a flight assistant. 
 USER: Hello, I am Eric Martin.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from IAH to DEN?

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

USER: I am planning to start on 10/22 and return back on 10/24.

ASSISTANT: Ok, may I know your airport codes please?

USER: Make sure that price is within 200.

ASSISTANT: I found a flight for you with Hawaiian airline and it costs you 200. Shall I proceed?

USER: Yes.

ASSISTANT: Your ticket has been booked with 1005 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.

USER: You are welcome.