You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your service?

USER: I need to book my ticket from Boston, BOS to Atlanta, ATL. Will you please help me with booking a flight ticket?

ASSISTANT: Sure, we are happy to assist you in booking. Can I have your name please?

USER: Sure, myself Kimberly Martin.

ASSISTANT: May I know if you have any connection preference?

USER: I need a connecting flight in my journey.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My planned travel dates are Oct 15 and Oct 17.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: I would like to depart in the evening time only.

ASSISTANT: Ok, please wait a moment I'll search best flight for you.

USER: Sure, I will wait for your response.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.