You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking for a direct flight for my journey from DCA to BOS. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: My planned trip dates are Mar 04 and Mar 06.

ASSISTANT:  For booking, we need your good name. Please mention it.

USER: Sure, my name is Patrick Robinson.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I already mentioned in the above, please recheck with that.

ASSISTANT: Is there any class preferences for you?

USER: No, I am comfortable with any class.

ASSISTANT:  Sorry to say that, there are no flights available on the routes of your journey.

USER: Not an issue with this one. Thank you for the information.

ASSISTANT: Thank you for opting us.