Hello,.
user
Hello.
assistant
I am Dennis Hills.
user
How may I amend you today?
assistant
Please, change my existing reservation as my dates of travel are postponed.
user
Sure, please wait for a while.
assistant
Sure.
user
Thanks for your time.
assistant
Ok, no worries.
user
We did not find any reservation on your name to proceed with change in existing reservation.
assistant
Ok, thank you for information.
user
Thank you for reaching us.
assistant