Hello, I am Samantha Lee.
Hello Samantha. How can I assist you?
 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 give me a minute.
Ok.
I will check the reservation status on your name. Samantha, unfortunately I could not find any reservation on your name.
Ok, no issues. Thank you.
You are welcome.