Hi.
user
Hello. How may I assist you?
assistant
I am Richard Anderson. Can you change my existing reservation due to my health issue?
user
Sure, I will help you.
assistant
Thank you.
user
Please, wait a minute.
assistant
Sure.
user
Thanks for waiting. I am sorry to inform you that, there is no reservation found on your name.
assistant
Oh! May be I have done a wrong reservation, anyways thank you.
user
Thank you for availing us.
assistant