You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Stephanie Collins. I want to alter my reservation, can you help me out?

ASSISTANT: Sure, I will help you with the change of flight reservation.

USER: Thank you.

ASSISTANT: Thanks for waiting. Sorry I could not find any flight reservation on your name.

USER: It's fine.

ASSISTANT: Thanks for reaching to us.

USER: Anyway, thank you for your help.