You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Carter.

ASSISTANT: How can I help you?

USER: Can you help me in cancelling my recent reservation?

ASSISTANT: Sure, let me check your reservation details in our database.

USER: Sure.

ASSISTANT:  Sorry, I did not find any reservation by your name in our database.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.