You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Joshua Evans. I would like to cancel my recent reservation, as my business meeting is postponed.

ASSISTANT: Sure, please wait for a moment to check your details in my database.

USER: Ok, I will be waiting.

ASSISTANT: Thank you for your patience. Sorry, no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome.