You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephen Walker here.

ASSISTANT: How can I assist you?

USER: I want to travel from MCO to ATL. Can you book my ticket?

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

USER: My travelling dates are from 02/22 to 02/24.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: It's ok. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.