You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can help you today?

USER: I would like to travel from IAD to OAK as a business trip, can you do the reservation?

ASSISTANT: Sure, can I know your good name please?

USER: Timothy Green here.

ASSISTANT:  When you are willing to travel?

USER: My trip dates are 07/24 and 07/26.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need break in my journey.

ASSISTANT: Are there any other specifications?

USER: No.

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 choosing us.