Hello,.
user
Hello, how may I help you today?
assistant
I am Charles Collins. Due to some health issue, I need to change my existing reservation, so can you help me in changing my reservation?
user
Sure, I will help you.
assistant
Thank you.
user
Please wait for a while.
assistant
Sure.
user
Sorry, there is no reservation found on your given name.
assistant
No problem, thank you for the information.
user
Thanks for choosing us.
assistant