You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you from my end?

USER: Myself Emma Moore. I want to change my existing reservation, due to some health issues. Can you help me?

ASSISTANT: Sure Emma, I am gleeful to help you out. Please allow me a moment to check the flight availability.

USER: Ok, take your time.

ASSISTANT: Sorry Emma, there is no active reservation on your name in our database.

USER: It's ok no problem, thank you for the information.

ASSISTANT: Thank you for reaching us.