You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Brenda Mitchell and I want to cancel my recently done reservation. Can you please help me?

ASSISTANT: Sure,I would be happy to help you.

USER: OK.

ASSISTANT: I am sorry to say this there is no reservation found. As per your requirement.

USER: OK, no problem. Thank you, for your help.

ASSISTANT: Thank you.