Hello.
user
Hello, how can I assist you?
assistant
Due to sudden work,  I want to change my reservation. Can you please help me with it?
user
Sure, may I know your name?
assistant
George Allen here.
user
Ok, please wait a moment.
assistant
Ok.
user
Sorry, there is no reservation found on your name.
assistant
Ok, not an issue. Thank you.
user
Thank you for reaching us.
assistant