Hi. I am William Roberts.
user
Hello, how can I serve you today?
assistant
Owing an emergency want to change my reservation, so can you help me with it please?
user
Sure, I will help you. Please wait for a while, I will check your reservation.
assistant
Ok,  take your time.
user
Thank you for your time, there is no reservation found on your name.
assistant
That's ok. Thank you for the response.
user
Thank you for approaching us.
assistant