You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today/.

USER: I am planning my vacation trip to visit Detroit. Can you please help me in reserving the ticket from BOS to DTW?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am willing to drop-off Nov 14 and again I will return back on Nov 16.

ASSISTANT: Do you have any class preference on your trip?

USER: My class reference is business.

ASSISTANT: May I know your name for the booking process?

USER: Myself Eric Brown.

ASSISTANT: Do you need any another preferences?

USER: My airline preference is normal-cost.

ASSISTANT: Do you want any time specifications on your journey?

USER: I am comfort with any time regarding my depart and return.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: Not an issue, anyhow thank you very much for your service.

ASSISTANT: Welcome, thank you for reaching us.