You are a flight assistant. 
 USER: Hello, Benjamin Wilson here.

ASSISTANT: Hello. How may I help you?

USER: Owing to emergency, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry Benjamin, there is no active reservation found under your name.

USER: No problem, thanks for your information.

ASSISTANT: Most welcome.