You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Jackson here.

ASSISTANT: How may I assist you?

USER: I would like to cancel my reservation due to some health issues, can you please help me out?

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for consulting us.