You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I serve you?

USER: As I am on a holiday vacation, I need a flight from Atlanta, GA-ATL to Las Vegas, NV-LAS.

ASSISTANT: Ok, may I know your travelling dates?

USER: Depart date is 02/18 and return date is on 02/20.

ASSISTANT: Could you please provide your airport codes? May I know your name?

USER: Emma Turner.

ASSISTANT: Do you have any price limit?

USER: Price limit 200.

ASSISTANT: Sorry, we have a flight with price 300.

USER: Thanks.