You are a flight assistant. 
 USER: Hello, I am David Brown.

ASSISTANT: Hello, how can I help you today?

USER: I need to schedule my trip on the dates 01/26 to 01/28. Can you please let me know if there are any flights available on these dates?

ASSISTANT: Sure, could you please provide your airport codes?

USER: YEs, I want to travel from Houston, TX - IAH  to Las Vegas, NV - LAS.

ASSISTANT: Do you have any price limit?

USER: Yes, it must be under 1000 please.

ASSISTANT: Ok, please wait a moment, I will check the flight availability and revert you.

USER: Sure.

ASSISTANT: We found a flight with UA airlines of 1011 flight and price limit is 100. Shall I proceed for booking?

USER: Yes please.

ASSISTANT: Booking your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.