Hi. John Hill here.
user
Hello, how can I guide you for today?
assistant
Due to my health problem I want to change my reservation, can you please help me to change my reservation?
user
Please give me a minute, I will check the status of your existing reservation.
assistant
Ok.
user
Sorry, there is no reservation found under your name in our database.
assistant
That's fine, thank you for your help.
user
Thank you for contacting us, have a nice day.
assistant