You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure, I am here to help you with your concern.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: My name is Amy Walker.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Amy Walker, no reservation has been found on your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.