You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER:  I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. Can you please help me out with changing of my reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Myself William Jackson.

ASSISTANT: We found a reservation on your name. Can you please share your airport codes?

USER: My airport codes are from OAK to CLT.

ASSISTANT: Can you please share your planned trip dates?

USER: My trip dates are from 10/09 to 10/11.

ASSISTANT: Do you have any connection limit?

USER: My connection limit is 1.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: We found a connecting flight of fare 100 with airline American and number is 1002. Can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked in economy class.

USER: Thank you so much.

ASSISTANT: Thank you for availing us.