You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: I am Paul Adams. I am planning to go to Houston hop-on hop-off tour on 11/01, please help me in booking a flight ticket within price 200.

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, my nearest airport code is TX-AUS and destination is TX-HOU.

ASSISTANT: When do you planned your return date?

USER: I will return on 11/03.

ASSISTANT: Sorry there is no flight found on your price range.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for approaching us, have a nice day.