You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have to attend my convocation ceremony at Chicago, could you book my ticket from MCO to ORD?

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

USER: My trip dates are 09/16 and 09/18.

ASSISTANT: May I know your name please to proceed further?

USER: Christine Young here.

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

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

ASSISTANT: Thank you for approaching.