Hi.
user
Hello.
assistant
I am Paul Parker.
user
How can I help you today?
assistant
I want to change my reservation due to health problem, can you help me?
user
 I understand your request and will be happy to help you. Please wait for a moment.
assistant
Sure.
user
Sorry Paul, there is no reservation found by your name in our database.
assistant
No problem, thanks for checking.
user
Most welcome.
assistant