You are a flight assistant. 
 USER: Hi. I am Karen Lewis.

ASSISTANT: Hello. How may I help you today?

USER: I had reserved a flight ticket last week for my visit to New York and now I want it to be cancelled and I am hoping that my money will be refunded.

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait for a minute, I will get back to you.

USER: Sure.

ASSISTANT: Karen Lewis, I am sorry to say that there is no flight found under your name.

USER: No, I cannot believe it as my friend has done the flight reservation on behalf of me and now I am worried to return the money back to him at any cost.

ASSISTANT: I am sorry for that.

USER: Ok, I will check with my friend again may be he has already cancelled it. Thanks for your time.

ASSISTANT: Thank you for contacting us, have a great day.