Hi. I am Michael Harris.
user
Hello, may I know how best I can help you today?
assistant
 Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?
user
Sure, please wait for a while, I will check the reservation list and revert to you.
assistant
Ok, take your time.
user
Sorry to notify, there is no reservation found on your given name.
assistant
That's ok. Thank you for the response.
user
Thanks for reaching us.
assistant