You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Nicholas White. I want to cancel my reservation, due to postponement of concert to be held at the place where I wanted to visit, can you please help me?

ASSISTANT: Sure Nicholas. Nicholas, in my database I did not found any reservations with your name.

USER: It's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.