You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, what can I do for you today?

USER: I am Amy Lewis. I want to book a flight ticket to meet my uncle in Las Vegas, will you help me in booking a flight ticket with a price limit of 200?

ASSISTANT: Sure, may I know your journey codes?

USER: I need to leave from my nearest airport PHX to reach LAS.

ASSISTANT: When do you want to travel?

USER: I want to travel on 04/10, and need to catch return flight on 04/12.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight available.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for availing us.