You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Turner.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for your help.