You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I assist you for today?

USER: In the last month I have reserved a flight ticket on my name to travel to San Francisco to celebrate my father birthday but suddenly there is an examination on the same date and our college management has informed suddenly to us. So I am unable to travel the trip which I was planned. Can you please help me in changing my flight ticket?

ASSISTANT: I am glad to help you about your flight ticket modification.

USER: Thank you for accepting my request.

ASSISTANT: Can you please help me with your name to check the existing reservation under your name to check?

USER: Sure, my name is Nicole Allen.

ASSISTANT: I have found your reservation which is under your name. Can you please provide your modified airport codes?

USER: Sure, I would like to modify my source region to Atlanta, GA-ATL and the terminus code to change is to Boston, MA-BOS.

ASSISTANT: Please provide your scheduled dates of journey so that I can change your flight ticket reservation.

USER: Sure, I have rescheduled the journey dates to move on 01/08 and later I will catch the return flight on 01/10 to return back to Atlanta, GA-ATL location.

ASSISTANT: Please hold on for sometime, in meanwhile I can check a suitable flight for your journey based on your modified destination.

USER: Sure, I will wait for your response and provide me the obtained flight on my new dates to reach my destination region.

ASSISTANT: Lucky there is a flight which can travel to your exam location at the last moment with a airfare of 100 having a single layout in between your journey that to in an economy class. Would you like to book this flight for your journey?

USER: Ok, is there any other flights available to reach my location or else only this flight is moving to my region?

ASSISTANT: This is the only flight which can travel to your region as one of the passenger cancelled his booking.

USER: Ok, that's fine. You can reserve a seat for me as quick as possible in the above flight which you have mentioned.

ASSISTANT: As per your interest towards this flight I have booked your flight ticket with the flight 1012.

USER: That's great to hear from your side for helping me in flight ticket reservation, I appreciate your agency. Thank you so much for your service.

ASSISTANT: Thanks a lot for having our service as your helping hands for your flight ticket modification. Have a safe flight to your region in an economy class.

USER: You are most welcome.