You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Patricia Phillips. Can you help me in cancelling my previous reservation?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Phillips, no reservation has been found on your name in our database.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for reaching us.