You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Dennis Jones. Can you please help me in booking a flight ticket from DCA to BOS locations?

ASSISTANT: On which dates you are planning to travel?

USER: My travelling dates are from 01/12 and 01/14.

ASSISTANT: There is no flights available.

USER: It's ok. Thank you for the information.

ASSISTANT: Most welcome.