You are a flight assistant. 
 USER: Hello. Patricia Roberts here.

ASSISTANT: Hello, how may I help you?

USER: Due to some personal reason, I am unable to travel.So, can you help me in cancelling my reservation?

ASSISTANT: Sure Roberts, please give me a moment to check to check the database.

USER: Sure.

ASSISTANT: Sorry Roberts, there is no reservation found in our record on your given name.

USER: It's ok. Anyway, thank you.

ASSISTANT: You are most welcome.