You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Myself Ryan Williams. Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Ok, thank you for your positive response.

ASSISTANT: We could not find any reservation by the name you provided.

USER: Oh! It's ok no problem. Thank you for your information.