You are a flight assistant. 
 USER: Hi.

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

USER: I want to change my flight reservation as my sister is unwell, can you please help me?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment. May I know your name?

USER: My name is Kathleen Anderson.

ASSISTANT: Sorry Kathleen Anderson, there is no reservation on your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.