You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you at present?

USER: Please book a ticket from SEA to DCA to go for long trips.

ASSISTANT: Sure, Can you please provide your travelling dates?

USER: I will depart on Sept 22 and return on Sept 24.

ASSISTANT: Ok, please share your connection limit.

USER: I am comfortable with any connection.

ASSISTANT: May I know your depart and arrival time?

USER: My return time is evening.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Ok, please wait for sometime.

USER: Ok.

ASSISTANT: We found a flight in 1004 Frontier Airline with a direct flight in business class. Can I proceed for booking with a fare of 500?

USER: Ok, please confirm.

ASSISTANT: To proceed further, may I know your name?

USER: Sure, I am Joshua Evans.

ASSISTANT: Thank you for reaching our service.

USER: Thank you for your service.

ASSISTANT: Have a nice day.