You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am looking for a flight from DCA to LGA, can you help me in booking?

ASSISTANT: Sure, I am glad to help you out. Please provide me your trip dates.

USER: Sure, my planned travel dates are June 13 and June 15.

ASSISTANT: May I know your name to proceed further?

USER: Myself John Robinson.

ASSISTANT: Do you have any requirement?

USER: I prefer for an economy class.

ASSISTANT: Do you have any connection limit?

USER: Please look for a direct flight.

ASSISTANT: Sorry  John Robinson, there is no flight in your route as per your requirement.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.