You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Cynthia Edwards.

ASSISTANT: How may I help you?

USER: I would like to travel from MCO to DCA, could you help me out?

ASSISTANT: May I know your trip dates?

USER: My preferable dates are from 05/02 to 05/04.

ASSISTANT: Sorry, there is no flights available.

USER: That's ok. Thank you for your time.

ASSISTANT: Most welcome.