You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jonathan Campbell here.

ASSISTANT: How can I help you?

USER: Can you please help me with cancelling my previous booking now?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: Oh! That's very disappointing to know. Anyways, thank you for checking.

ASSISTANT: Welcome, have a nice day.

USER: You are welcome.