You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Larry Allen.

ASSISTANT: How may I help you today?

USER: I want to cancel my reservation..

ASSISTANT: Sure, wait for a minute.

USER: Sure.

ASSISTANT: Sorry Allen, no reservation found on your name in our database.

USER: That's ok. Than you.

ASSISTANT: Thank you for reaching us.