You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: William Hill here, I need to cancel my reservation as my college annual day program got cancelled. Can you help me?

ASSISTANT: Sure, wait a moment while we check your previous flight reservation in airline database.

USER: Sure, take your own time.

ASSISTANT: Sorry, based on your name we haven't found any flight ticket to cancel in airline database.

USER: Ok fine, thanks for checking.

ASSISTANT: Thanks for contacting us.