Hi.
user
Hello, how may I help you today?
assistant
I would like to change my reservation, can you help me out with that?
user
Sure, may I know your name for the changing process?
assistant
Sure, my name is Helen Garcia.
user
 Sorry, we couldn't find a reservation on your name to change.
assistant
No issues, thank you for your time.
user
Welcome, thank you for reaching us.
assistant