You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Perez.

ASSISTANT: How can I assist you?

USER: I need to cancel my reservation, can you help me out?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Thank you with that.

ASSISTANT: Robert, there is no reservation found under your name to do cancellation.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.