You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Rebecca Taylor. I have planned to visit temple at at Washington, DC-IAD, so could you please help me with booking a flight ticket from Seattle, DC-IAD?

ASSISTANT: Sure, may I know when are you planning to make your trip?

USER: Sure, I want to start my journey on 04/21 and end my journey on 04/23.

ASSISTANT: How much can you spend to buy your ticket?

USER: I can afford up to 5000 for a flight ticket.

ASSISTANT: Ok, there is a flight matching your request.

USER: May I know the flight details please?

ASSISTANT: Delta airline with flight number 1008 and the fare is 100. Shall I go ahead?

USER: Yes, please proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.