Hi.
user
Hello, how may I be of your help?
assistant
I want to change an existing reservation due to sudden change in my trip. Can you help me?
user
Sure, please let me know your name to check the current status and revert you.
assistant
I am Gregory Thomas.
user
It's unfortunate that there is no reservation found ion your name.
assistant
OK. Thank you for your information.
user
Thank you for consulting us.
assistant