You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to travel from BOS to IAH as a business trip. Can you do the reservation?

ASSISTANT: Sure, please share me your trip dates.

USER: My journey dates are 11/19 and 11/21.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I need break in my journey.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: Is there any time concern for you?

USER: Departure time should be afternoon.

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

USER: Christopher Thomas here.

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

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.