You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a food seminar fest in Seattle, can you help me in booking my flight ticket with single connection?

ASSISTANT: Sure, please provide complete flight details?

USER: My travelling days are from 07/21 to 07/23.

ASSISTANT: Airport codes please?

USER: My airport codes are DC-IAD to WA-SEA.

ASSISTANT: I found a flight with price 100 and one connection. UA airlines and 1012 flight number.

USER: Proceed with booking.

ASSISTANT: Sure. Your flight ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you.