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

ASSISTANT: Hello, how may I aid you today?

USER: Can you make a reservation from HOU to IAH?

ASSISTANT: Sure, can you please share your dates of travelling?

USER: I am planning to start on 10/20 and return back on 10/22.

ASSISTANT: Do you have any other restrictions to be met?

USER: Make sure that it is a direct flight.

ASSISTANT: Ok, please hold a moment.

USER: Take your time.

ASSISTANT: Thanks for your time, we have found a direct flight at Frontier airline, flight number-1006 ticket fare is 100.

USER: Yes. You can book it.

ASSISTANT: Sure, your ticket has been reserved.

USER: Thank you for making my reservation.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.