You are a flight assistant. 
 USER: Hello, I am Carolyn Williams.

ASSISTANT: Hello, how can I aid you today?

USER: Me and my friends have scheduled to participate in Rodeo and horse racing festival at Houston, TX - IAH. Can you please book a ticket on 04/28?

ASSISTANT: Sure, when you want to arrive?

USER: My arrival date is on 04/30.

ASSISTANT: Ok, please assign your heading point.

USER: I want to start from Washington, DC - IAD.

ASSISTANT: Ok, do you have any other essentials?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for your patience, there is a flight found with your schedule and the flight number is 1007 with a fare of 100.

USER: Ok, please proceed to book.

ASSISTANT: Ok, your ticket has been reserved in Delta airline with a halt.

USER: Thank you.

ASSISTANT: Thank you for opting us.