Hi,.
user
Hello. How may I assist yo 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, may I know your good name please?
assistant
Thanks for your response. Amy Gonzalez, is my name.
user
Ok, please stand by.
assistant
Sure.
user
There is no existing reservation found on your name.
assistant
Ok, thanks for your kind information.
user
Thank you for reaching us.
assistant