Hello. My name is Robert Collins.
user
Hello, how can i aid you?
assistant
Actually, I want to attend a music concert in NYC, but due to personal problem, my trip is postponed.
user
Ok Robert, do you want me to change the reservation or cancel it?
assistant
Please change my existing reservation.
user
Ok Robert, please wait a moment while I look into the reservation list.
assistant
Sure, take your time.
user
Yes Robert, can you provide your travel codes?
assistant
My airport codes are IAD and ORD respectively.
user
Can you provide your travel dates?
assistant
My preferable dates are 01/25 and 01/27.
user
We regard to inform you that there is no flight avalible for those dates.
assistant
That's ok. Thank you for your time.
user
Is there anything else I can do for you?
assistant
No, thanks.
user
Thank you for choosing us.
assistant