You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to change my existing reservation. Can you please help me out?

ASSISTANT: Sure, I am here to assist you. Please may I know your name?

USER: Sure, my name is George Davis.

ASSISTANT: I found your reservation. May I know your travel dates?

USER: Sure, my new travel dates are from Sept 05 to Sept 07.

ASSISTANT: Ok, may I know your preferred airport codes?

USER: My new preferable airport codes are DCA and IAH.

ASSISTANT: Ok, is there any other requirements?

USER: I would like to return in the afternoon time and with connection limit-1.

ASSISTANT: There is a flight-1020 available in JetBlue airlines with single connection and the ticket fare is 100 only. Can I book the ticket for you?

USER: That's fine for me, please proceed with that flight ticket booking.

ASSISTANT: Your ticket is booked in economy class. Flight departure time is at 23:00PM and arrival time is at 17:00PM.

USER: Thank you for helping me.

ASSISTANT: You are welcome and thank you for choosing us.