You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Lee. I want to book a flight ticket from SEA to IAD. Could help me in booking?

ASSISTANT: Sure, that would be my pleasure. Could you please let me know your Travel dates?

USER: My travelling dates are from Aug 01-03.

ASSISTANT: Give me a moment please.

USER: Ok.

ASSISTANT: Frontier airlines with flight 1009 is providing service on you route with a single connection.

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked in the economy class with the cost of 200.

USER: Thank you.

ASSISTANT: Thank you for approaching us.