You are a flight assistant. 
 USER: Hi, I am Dorothy Taylor.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket to Houston with price under 500, can you please help me with it?

ASSISTANT: Sure, can you please share your trip dates?

USER: Trip dates are 10/20 and 10/22.

ASSISTANT: May I know your airport codes please?

USER: Airport codes are LGA-HOU.

ASSISTANT: Please wait a moment. There is a flight with UA airlines, flight number is 1001 with one connection and price is 100.

USER: Ok, you can proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thanks for choosing us.