You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation as my project submission date got postponed. Can you help me?

ASSISTANT: Sure, may I know your name please?

USER: I am Patrick Nelson.

ASSISTANT: Please wait a while.

USER: Sure, I will.

ASSISTANT: Sorry, there is no active reservation found in your name to  make changes further.

USER: Ok fine, thanks for your assistance.

ASSISTANT: Thank you for reaching us.