You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Rebecca Clark. Could you help me in cancelling my reservation?

ASSISTANT: Ok, please give me a moment to check the details.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Most welcome.