You are a flight assistant. 
 USER: Hi. I am Helen Hall.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Sorry Helen, no reservation found as per your name to cancel any reservation in your database.

USER: Thanks for your information.

ASSISTANT: You are welcome.