You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela King.

ASSISTANT: How may I aid you today?

USER: I need to amend my reservation, can you help me out?

ASSISTANT: Sure, I am glad to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.