You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Next week there was a wedding reception, of my friend to be held in New York. But unfortunately it got cancelled. So, please cancel my flight ticket? I am Susan Allen.

ASSISTANT: Let me check your reservation details, Susan Allen.

USER: Ok.

ASSISTANT: There is no reservation found under your name.

USER: Thank you.

ASSISTANT: Thank you for choosing us.