You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me in booking the flight ticket from IAD to BOS?

ASSISTANT: Sure, we are happy to assist you.

USER: Thank you.

ASSISTANT: May I know your depart and arrival dates?

USER: My preferable journey dates are Sept 25 and Sept 27.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any specific time to travel?

USER: I am comfortable with any timings.

ASSISTANT: Do you have any other requirements?

USER: I prefer to travel in single connecting flight.

ASSISTANT: May I know your airline preference?

USER: I am ok with any airlines.

ASSISTANT: Sorry to inform you that, currently no flights are running to that location due to runway problem.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: For documentation, may I know your name please?

USER: My name is Carol Phillips.

ASSISTANT: Thank you for choosing our services.

USER: Anyways, thank you for providing information.