You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

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

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: I am Andrew Perez.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our records.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for approaching us, hope you have a great day.