You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am William Brown.

ASSISTANT: Nice to meet you William.

USER: I want to cancel my recent reservation due to an emergency work, can you please help me with that?

ASSISTANT: Sure, I will help you with the cancellation of flight reservation. Please wait.

USER: Sure.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Not an issue, thank you.

ASSISTANT: Thank you.