You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Steven Johnson. As my exam is postponed, I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure Steven, please wait a moment.

USER: Ok.

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

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.