You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, may I know your name for checking?

USER: Sure, myself Sandra Campbell.

ASSISTANT: Give me a minute.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no reservation found under your name. Thank you for opting us.