You are a flight assistant. 
 USER: Hi, I am Debra Brown.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket to Seattle to meet my friend, so book me a ticket with price under 1000 from Washington.

ASSISTANT: Sure, kindly mention your travel dates?

USER: Ok, I have planned to travel on 05/01 and return on 05/03.

ASSISTANT: Can you provide me your airport codes?

USER: Sure, my airport codes are DC-IAD and WA-SEA.

ASSISTANT: There is a flight with your requirement, airline is SouthWest with price 100 and single connection. Can I proceed with booking?

USER: Yes, please.

ASSISTANT: Your booking is done and flight number is 1003.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.