You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT:   Melissa Jackson, we haven't found any reservation under your name in our database.

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

ASSISTANT: Thank you for approaching us.