You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to Dallas, TX-DFW to attend a business meeting with my partners who live there, could you help me in booking my flight from NV-LAS.

ASSISTANT: Sure, I am happy to help you.

USER: I prefer a direct flight.

ASSISTANT: Ok, Can you please provide your trip dates?

USER: I would like to fly out on 01/25 to 01/27.

ASSISTANT: Ok, May I know your price limit?

USER: Yes it is 500.

ASSISTANT: Ok, May I know your name?

USER: Ok, Melissa Taylor is my name.

ASSISTANT: Thank you for providing details, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patient, we found an AA airline with one connection which does not matches your requirements.

USER: Ok, go through my booking.

ASSISTANT: Sure, your ticket has been booked with flight number 1020. The price is 100.

USER: Thanks for your grateful service.

ASSISTANT: Thank you for reaching us.