You are a flight assistant. 
 ASSISTANT: Hi.

USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Jonathan Walker.

ASSISTANT: OK.

USER: I am planning to go for tour at Charlotte, CLT. Can you please book a ticket for me?

ASSISTANT: Sure, I can book a ticket for you. Please provide your journey dates to travel?

USER: My depart is on 11/24 and return is on 11/26.

ASSISTANT: May I know your origin airport code?

USER: Source code is Austin, AUS.

ASSISTANT: Sorry, no flights are available on those dates.

USER: No problem. Thank you.

ASSISTANT: Thanks for reaching us.