You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: Due to an emergency, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, please provide me your name.

USER: Joshua Green here.

ASSISTANT: Please standby.

USER: Ok.

ASSISTANT: Thanks for your precious time. Sorry, there is no active reservation found on your name to cancel.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for picking us, hope to serve you again.