You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please book a ticket from IAD to SEA to attend an interview.

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My travelling dates are Apr 5 and Apr 7.

ASSISTANT: May I know your max connection limit?

USER: I want single connected flight.

ASSISTANT: Do you need business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: Do you need any other requirements?

USER: My depart time is evening.

ASSISTANT: May I know your name?

USER: I am Edward Perez.

ASSISTANT: As per your requirements there is a American airlines, flight number:1012 is going on your way with single connection and price:100. Is that Ok for you?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thank you for opting us.