You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Would it be possible to change my reservation to new travel dates?

ASSISTANT: Sure, I am here to assist you with your concern. May I know your name please to check your reservation status?

USER: Ok, I am Emma Harris.

ASSISTANT: Please hold on a moment. Emma Harris, no reservation has been found on your name in our database.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for choosing us.