You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to book a ticket from BOS to DFW. Can you please help me out?

ASSISTANT: Sure, can you please mention with your dates of journey?

USER: I am planning to travel on Mar 11 and return back on Mar 13.

ASSISTANT: May I know your good name please?

USER: My name is Kimberly Wilson.

ASSISTANT: Are you looking for any other help from my side please?

USER: My depart time is evening and I am looking for a business class.

ASSISTANT: Please wait for a mean while.

USER: I am looking for a connecting flight.

ASSISTANT: Sorry Wilson, there is no flight found as per your travelling details.

USER: That's fine, thank you for your service.

ASSISTANT: You are welcome.