You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please be my helping hand in changing my existing reservation?

ASSISTANT:  Sure, may I know your name to check your reservation from our database?

USER: James Phillips here.

ASSISTANT: We regret to inform you that there is no active reservation found on your name to cancel.

USER: Not a problem, thank you.

ASSISTANT: Thank you.