Hello.
user
Hello, how can I help you?
assistant
I would like to change my existing reservation, please help me out.
user
Sure, may I know your name please to check the reservation status?
assistant
My name is Alexander White.
user
Please wait for a minute.
assistant
Sure.
user
There is no reservation found with your details, White.
assistant
Ok, no problem. Thank you for your information.
user
Thank you for contacting us.
assistant