You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Barbara Jones, want to travel from MCO to DCA. Please help me in booking my ticket.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 06/05 to 06/07. Make sure that the price of the flight should be 200.

ASSISTANT: Sorry, there is no flights available on this route.

USER: It's ok, thank you.

ASSISTANT: You are welcome.