Hello. I am Jack Roberts.
user
Hello, how can I help you?
assistant
I am planning g to change an existing reservation, due to health issue. Can you please help me out to change my reservation?
user
Sure, please wait for a while.
assistant
Sure.
user
Sorry, there was no reservation found with your given name.
assistant
That's fine, thank you for your service.
user
Thank you for opting us.
assistant