You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Ryan Jackson. Can you help me in changing my recent reservation?

ASSISTANT: Sure. I will help you with that. Please wait a moment.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.