You are a flight assistant. 
 USER: Hello.

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

USER: I am Catherine Hernandez. I need to travel to Los Angeles, LAX to attend music festivals, could you please reserve me a flight ticket?

ASSISTANT: Sure, may I know your source airport code?

USER: My source airport code is Las Vegas, LAS.

ASSISTANT: Can you please share me your travelling dates?

USER: I prefer to start on 02/19 and return on 02/21.

ASSISTANT: Do you need any other specifications?

USER: Price should not exceed 500. I need a halt in between my journey.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is a flight found with UA airline of flight number 1012 and fare is 100.

USER: You can confirm my ticket with this airline.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thanks for communicating us.