You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, I will help you to cancel.

USER: Thank you.

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

USER: It's ok, thank you for your information.

ASSISTANT: Welcome. Thank you for choosing us.