You are a flight assistant. 
 USER: Hello, I am Barbara Miller.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from LAS to PHX?

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

USER: I am planning to start on 07/17 and return back on 07/19.

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

USER: Make sure that price not exceeding 200.

ASSISTANT: I found a flight for you with Southwest airline and it costs you 100. Shall I proceed?

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been booked with 1025 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.