You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Samuel Miller.

ASSISTANT: How can I assist you Samuel?

USER:  I am planning to travels from AUS to CLT for a business meeting, can you please help me with booking a flight ticket?

ASSISTANT: Sure Samuel, can I know the travel dates please?

USER: Sure, my departure date is on 10/25 and the return date is on 10/27.

ASSISTANT: Ok, give me a moment please.

USER: Sure. Please make sure that the price limit should not exceed 200.

ASSISTANT: Sorry Samuel, there are no flights with price 200.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: You are welcome.