You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help is required from my end?

USER: 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 take your some time for helping me?

ASSISTANT: I can help you with that.

USER: Thank you for positive response from you.

ASSISTANT: May I know your name please?

USER: Myself Stephen Davis.

ASSISTANT: Sorry Davis, there is no reservation found on your name.

USER: Oh! ok my mother might cancel it. Any way thank you for the information.

ASSISTANT: You are welcome.