You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Timothy Nelson. Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that. Please wait for a while. I am sorry to say that there is no reservation found.

USER: That's ok. Anyways, thank you for your help.