You are a flight assistant. 
 USER: Hello, I am Mary Jackson.

ASSISTANT: Hello, how may I help you today?

USER: I have planned to meet my family friend on his birthday so I need to book a ticket.

ASSISTANT: Sure, can I have your airport codes and dates of travelling?

USER: My travel dates are 04/09 and 04/11. My source is Charlotte, NC - CLT. My destination is Las Vegas, NV - LAS.

ASSISTANT: Ok, please hold on, let me check with the airlines availability and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, we are pleased to inform you that we have found a flight of Southwest airline, flight number-1000 connections-1 and price limit is 300. Shall I proceed with the booking?

USER: Do not proceed for booking. My price limit is 200.

ASSISTANT: Ok.

USER: Thank you for your service.

ASSISTANT: Thanks for opting us.