You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a Marriage in Boston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, Can you provide me with the airport codes please?

USER: My airport codes are CLT and BOS.

ASSISTANT: Please provide withe the itinerary travel dates.

USER: My travelling dates are Dec 09 and Dec 11.

ASSISTANT: Is there any class preference?

USER: I want to travel in economy class.

ASSISTANT: May I know if there are any airline preference?

USER: I am comfortable with any airline.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: Is there any connection limit?

USER: I need direct flight.

ASSISTANT: May I know your name please?

USER: My name is Kenneth Clark.

ASSISTANT:  Kenneth Clark, I regret to inform that there are no flights available with the provided dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.