Hello.
user
Hello, how can I assist you today?
assistant
My name is Stephen Collins. Owing to emergency, I want to change my existing reservation. Please help me to change my existing reservation.
user
Sure, please wait for a moment.
assistant
Ok.
user
Sorry to say that, no reservation was found with your good name.
assistant
No problem, Thanks for your information.
user
Thank you for reaching us.
assistant