You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need to change my recent reservation, can you help me?

ASSISTANT: Sure, may I know the name?

USER: Myself Catherine Hill.

ASSISTANT: Sorry, there is no active reservation has been found under your name in our database to amend it.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.