Hello, I am Jonathan Jones.
user
Hello. How may  I aid you?
assistant
Due to an emergency meeting, I want to change my reservation. Can you help me with it?
user
Sure, I am here to help you. Please, wait for a while.
assistant
OK.
user
Thanks for waiting. Sorry, no reservation found on your name.
assistant
No problem, thank you for the information.
user
Thank you for contacting us.
assistant