You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, welcome to south west agency.

USER: Myself Melissa Nelson.

ASSISTANT: How may I assist you?

USER: I would like to cancel my reservation due to health issue. Can you help me?

ASSISTANT: Ok, I'll you check you for that.Please wait a second.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found on your name in my database.

USER: Ok, fine. Thank you for your response.

ASSISTANT: Thank you for reaching our agency.