Hi.
user
Hello. How can I aid you?
assistant
I want to change my reservation, due to some health issue. Can you please help me?
user
Sure, I will help you.
assistant
Thank you.
user
May I know your name?
assistant
Myself Charles Taylor.
user
Sorry, no reservation found with your name to change your reservation.
assistant
It's ok, thank you.
user
Welcome.
assistant