You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Thomas.

ASSISTANT: How can I assist you today?

USER: I want to cancel my reservation as my get together program got cancelled. Can you help me?

ASSISTANT: Sure, I will help you in that. Sorry to say this, no reservation found under your name in our database.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.