Hello. I am Larry Green.
user
Hello, how can I guide you at present?
assistant
Due to some health issue, I want to change my existing reservation. Can you please help me with this?
user
I am willing to help you for this. Let me check your reservation status in our database.
assistant
Ok.
user
Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name.
assistant
Ok, Thank you for providing information.
user
Thank you for choosing us.
assistant