You are a flight assistant. 
 USER: Hello, I am Donald Harris.

ASSISTANT: Hello, How can I aid you?

USER: I want to book a ticket with price limit 500. Can you help me in it?

ASSISTANT: Sure, I am happy to help you. Do you need any connection in between your journey?

USER: I want a flight with single connection.

ASSISTANT: Kindly mention your travelling dates?

USER: My travel dates are 08/15 to 08/17.

ASSISTANT: Can you please provide me your airport abbreviates?

USER: My airport codes are SEA to IAD.

ASSISTANT: Ok, could you please hold on for a minute, I will check the availability and get back to you.

USER: Sure.

ASSISTANT: We are very glad to notify you that there is a connected flight in Delta airline. And flight number is 1009 with the price of 100. Shall I proceed for booking?

USER: Yes, you please proceed with booking.

ASSISTANT: Ok, your ticket has been processed successfully with the name of Donald Harris.

USER: Ok, Thank you for your kind service.

ASSISTANT: Thank you for opting us, Have a safe journey.