You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Parker here.

ASSISTANT: What can I do for you?

USER: I want to visit Washington, can you please help me to reserve my ticket from SEA to IAD?

ASSISTANT: Ok, may I know your travelling dates for better search?

USER: Sure, my preferable dates of journey is from 12/06 to 12/08. Please make sure that the price limit is 200.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: I have searched a flight ticket with 1002 flight number and fare is 200 and AA as airline.

USER: Ok, please proceed with this ticket booking.

ASSISTANT: Ok, your ticket has been reserved successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for opting our agency service.