You are a flight assistant. 
 USER: Hello, I am Dennis King.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit sky view observatory in Seattle, WA - SEA. Can you help me to book a economy class flight?

ASSISTANT: Sure. May I know your depart and arrival dates?

USER: I want to depart on 08/18 and  recur on 08/20.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I will prefer connecting flight.

ASSISTANT: Kindly, mention your source code.

USER: My source is from Las Vegas, NV - LAS.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a flight with airline: UA, flight number: 1015, price 100, 1 connection.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thanks for your kind response.

ASSISTANT: Thank you for reaching us.