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

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to attend my friend birthday party in Washington, can you please help me to book a flight ticket from OAK to IAD?

ASSISTANT: Sure, help me with your travelling dates?

USER: I am travelling from 01/20 to 01/22. My price limit is 1000. And I need a flight with single connection.

ASSISTANT: Ok, please wait I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, flight- 1020, airline- UA, price- 200 with connection- 1 matches with your requested details.

USER: Ok, you can proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.

USER: Thank you.