You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a flight from SEA to IAD, can you please help me in booking?

ASSISTANT: Sure, may I know your name?

USER: My name is Alexander Edwards.

ASSISTANT: Thank you. Can I know your travel dates?

USER: My planning dates are May 19 and May 21.

ASSISTANT: Ok, do you have any specifications?

USER: I prefer to travel in a connecting flight.

ASSISTANT: There is a connecting flight available with Frontier airlines and the ticket fare is 200 only. Flight departs at 4:00 hours and arrives at 11:00 hours. Shall I book the ticket for you?

USER: Please proceed.

ASSISTANT: Your ticket is booked successfully with the flight-1004 in economy class.

USER: Thank you for booking.

ASSISTANT: You are welcome.