You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to cancel my recent reservation?

ASSISTANT: Sure, provide me your name.

USER: Melissa Collins here.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Melissa Collins. I regret to inform that there is no reservation by your name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.