You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.