You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jonathan Walker here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me out in cancelling my recent reservation?

ASSISTANT: Sure, I will help you with this. Jonathan Walker, there is no active reservation found under your name in our database.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for choosing our service.