Hello.
user
Hello. How can I help you?
assistant
I need your help to cancel my recent reservation, because my trip was cancelled unexpectedly. So please help me with that.
user
I will help you. Give me  a minute. May I know your name?
assistant
Ok. My name is Patricia Lee.
user
Sorry, there is no reservation found.
assistant
It's ok, thank you for the information.
user
Welcome.
assistant