You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please help me out in booking the ticket from IAD on Aug 16 with 1 connection.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code will be MCO.

ASSISTANT: Can I know your return date please?

USER: On Aug 18 I want to return back.

ASSISTANT: Do you have any other preference?

USER: I want to travel in economy class.

ASSISTANT: May I know your name please?

USER: Matthew Scott is my name.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.