You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, may I know your good name please?

USER: Timothy Johnson.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok, take your time.

ASSISTANT: We found reservation on your name in our records. Can I know your new departure and arrival travelling dates?

USER: I want to fly in the flight on Apr 16 and Apr 18.

ASSISTANT: Ok, please share your airport codes.

USER: I want to travel from LAX to ATL.

ASSISTANT: Ok, do you need a lay by in between the journey?

USER: I am looking for a connecting flight.

ASSISTANT: We found a American Airlines with fare of 300 and a lay by in between the journey matches your schedule.

USER: Proceed to booking.

ASSISTANT: Your ticket has been confirmed with flight number 1027.

USER: Thank you for helping me out.

ASSISTANT: Thank you for reaching us.