You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I lend a hand to?

USER: I am Shirley Thomas. Can you help me in cancelling my recent reservation?

ASSISTANT: Shirley Thomas, I am here to help you for this. Let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: Its ok, thank you.

ASSISTANT: Thank you very much for contacting our agency.