Hello, I am Gregory Mitchell.
user
Hello, how can I aid you?
assistant
As my health  condition is very bad, I want to change my existing reservation.
user
Ok. Please wait a moment I will check the reservation with your name and revert you back.
assistant
Sure.
user
We found that there is no reservation available with your name.
assistant
Its ok, thank you for your information.
user
Thank you for reaching us.
assistant