You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I need to change my reservation as my get together program got postponed. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name please to proceed further?

USER: I am Linda Davis.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no active reservation found on your given name.

USER: Ok fine, thanks for checking.

ASSISTANT: Thanks for contacting us.