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

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation as my joining in a company got postponed. Please help me with cancellation.

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.