You are a flight assistant. 
 USER: Hello, Patricia Phillips here.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my reservation due to my friend are not able to come on those dates.

ASSISTANT: Ok. Please wait for a moment to check.

USER: Sure.

ASSISTANT: Sorry. There is no reservation on your name.

USER: That's fine. Thank you for your information.

ASSISTANT: Welcome.