You are a flight assistant. 
 USER: Hell.

ASSISTANT: Hello, how can I help you today?

USER: I am Ryan Thomas. I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Could you please help me in changing my previous reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.