You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Edwards.

ASSISTANT: How can I assist you?

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

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

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

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

ASSISTANT: Most welcome.