You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I am planning to book a flight ticket to IAD from BOS, can you please help me out?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my planned travelling dates are Dec 25 and Dec 27.

ASSISTANT: Is there any connection limit do you have?

USER: Yes, I am looking for a 1 connected flight.

ASSISTANT: Do you need a business or economy class?

USER: Yes, I prefer business class.

ASSISTANT: Do you have any other specifications?

USER: Yes, my return time must be in morning.

ASSISTANT: May I know your good name?

USER: Sure, my name is Katherine Perez.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for connecting with us.