You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have plan to meet my friend in Austin, so could you please help me for ticket booking?

ASSISTANT: May I know your name please?

USER: I am Michelle Campbell.

ASSISTANT: Ok, may I know your airport codes?

USER: My travelling airport codes are from CLT to AUS.

ASSISTANT: May I know your trip dates?

USER: My departure date is 11/25 and my arrival date is on 11/27.

ASSISTANT: Sorry, no flights are there with your details.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.