You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Collins.

ASSISTANT: How can I assist you today?

USER: I need a flight ticket booking from DFW to PHL to attend a meeting, can you please help me with flight ticket booking?

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

USER: Sure, my preferable travel dates are Mar 31st and I will return back on Apr 2nd.

ASSISTANT: Do you have any specifications?

USER: I need a single drop in my journey and the flight must be depart in evening time.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. The JetBlue airline is providing a business class flight with price 700 and the connections 1. The departure time is evening.

USER: Yes, you can proceed with flight ticket booking.

ASSISTANT: Your ticket is booked. The flight number is 1022.

USER: Thank you for your immediate help in my flight ticket booking.

ASSISTANT: Welcome, have a great day.