You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to cancel my recent ticket booking due office on those days, can you do that for me?

ASSISTANT: Sure, I will help you in cancelling the ticket.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, I am Joshua Clark.

ASSISTANT: Sorry Clark, there are no reservations found on this name.

USER: Oh! Ok fine, no issues with it, thank you for your immediate response.

ASSISTANT: Most welcome.