You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Myself Stephen Garcia.

ASSISTANT: I found your reservation on your name, let me know your travel dates please?

USER: I want to fly on July 27 and return on July 29.

ASSISTANT: Could you please share me your airport codes?

USER: My airport codes are ATL, EWR.

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Delta Airlines is providing connecting flight with the ticket fare of 100 and depart time is 16:00 hours, arrival time is 13:00 hours, Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed by flight number 1015 in economy class.

USER: Thank you.

ASSISTANT: Thanks for choosing us.