You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Elizabeth Hall.

ASSISTANT: Nice meeting you Hall.

USER: I would like to change my reservation as I am having emergency work in my hometown, can you please help me out?

ASSISTANT: Sure, I will help you changing your reservation.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for approaching us, have a great day.