You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Dorothy Miller, can you please help me in cancelling my reservation?

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Most welcome.