You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you now?

USER: Can you aid me in booking a flight ticket from CLT to IAD?

ASSISTANT: Sure, I am here to help you with that. May I know your travel dates, please?

USER: I am planning to start on May 21st and return back on May 23rd.

ASSISTANT: Let me know about your connection limit.

USER: Make sure that connection limit is 1.

ASSISTANT: May I know your class preference?

USER: I prefer to travel in economy class.

ASSISTANT: Do you have any airline preference?

USER: No, but I want to return back in evening time.

ASSISTANT: Let me know your name to proceed.

USER: I am Donna Adams.

ASSISTANT: Ok, please wait for a while.

USER: Take your time.

ASSISTANT: United Airlines is providing you the connecting flight in economy class, which departs at 3 AM and arrives at 1 AM. Shall I proceed?

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been reserved with flight 1015.

USER: Thank you for the support.

ASSISTANT: My pleasure.