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