You are a flight assistant. 
 USER: Hello, I am Helen Moore.

ASSISTANT: Hello, how can I help you today?

USER: As my plan to submit my research documents at Seattle, can you help me to book a flight ticket with in the fare limit 200?

ASSISTANT: Sure, we are perky to help you. Kindly mention your travel dates?

USER: My plan to start on 03/04 and I intend to return on 03/06.

ASSISTANT: Can you please mention your airport codes?

USER: My source is Washington DC-DCA and my landing point is Seattle, WA-SEA.

ASSISTANT: Ok, please wait a moment I will check and get back to you with flight details.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is SouthWest with price 100 and single connection.

USER: That's fine, please go ahead with the booking.

ASSISTANT: Your booking is done and flight number is 1006.

USER: Thanks for your assistance.

ASSISTANT: Thanks for reaching us.