You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you today?

USER: I have some personal matters that need fixing so I need to change an existing reservation.Can you please help me?

ASSISTANT: Sure, To proceed for changing your reservation I need your name.

USER: My name is Ryan Anderson.

ASSISTANT: There is no reservation found with your name Ryan Anderson.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.