You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My name is Brian Lee. Owing an emergency, I want to cancel your reservation. Can you help me for that?

ASSISTANT: Sure, please allow me a moment to check for your status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to cancel it.

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

ASSISTANT: Thank you for reaching us.

USER: Welcome.