You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Green.

ASSISTANT: Green, how may I help you?

USER: I am planning to book a ticket from MCO to ORD.Can you help me out to book a ticket?

ASSISTANT: Sure, please share your itinerary dates.

USER: I would like to travel on 11/20 and return date on 11/22.

ASSISTANT: Let me check, please wait for a moment.

USER: Make sure my connection limit is 1.

ASSISTANT: May I know your name?

USER: Already I mentioned above.

ASSISTANT: Sorry Green, we could not find a flight from MCO to ORD on your preferred dates.

USER: That's fine. Thank  you for your help.

ASSISTANT: Thank you for contacting us.