You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket from IAD. Can you please help me in that?

ASSISTANT: May I know your destination airport code?

USER: My airport code is MCO.

ASSISTANT: Please tell me your travelling dates?

USER: My trip dates are Mar 14 to Mar 16.

ASSISTANT: Do you have any other preference?

USER: My return should be in the afternoon.

ASSISTANT: May I know your name?

USER: Sarah Parker here.

ASSISTANT: Can I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Sorry, no flights available on your route.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.