You are a flight assistant. 
 USER: Hello. My name is Donald Young.

ASSISTANT: Hello, we are glad to have you as a customer, how can I serve you today?

USER: I want to visit to my uncle's house after a long time, can you help me for booking a flight ticket with the price limit of 500?

ASSISTANT: Sure, can you please share your journey dates and connections?

USER: My journey dates are from 12/27 to 12/29. I need only one connection.

ASSISTANT: Ok, can you please specify your source and destination?

USER: It is an round trip my source and destination is Washington, DC - DCA.

ASSISTANT: Ok, please wait for a while, let me check the availability and revert to you.

USER: Sure.

ASSISTANT: Thanks for your time, we are happy to inform you that we have found a flight of  UA airline, flight number-1028 connections-1 and price limit is 100. Shall I proceed to booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Sure, your dates has been reserved.

USER: Thanks for your service.

ASSISTANT: Thanks for reaching us, have a safe journey.