You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I had a business work in Fisherman's Wharf which is located in San Francisco, can you please aid me to book a flight ticket from Boston?

ASSISTANT: Sure, please share me your trip dates.

USER: Thank you. The preferable trip dates are Dec/26 and Dec/28.

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

USER: My name is James Hall.

ASSISTANT: Is there any time concern for you?

USER: No, I didn't have any concerns for my journey.

ASSISTANT: May I know your class preferences?

USER: No, I didn't have any other preferences.

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

USER: Oh! It is sad to hear from your agency. Anyhow thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are welcome.