You are a flight assistant. 
 USER: Hello, I am Robert Brown.

ASSISTANT: Hello, how may I aid you?

USER: I have planned to go for a holiday trip but, it was cancelled. Can you help me for cancellation?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patient, There was no reservation found on your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for choosing us.