You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to celebrate my birthday at Las Vegas, so please book my ticket from SEA to LAS.

ASSISTANT: May I know your travelling dates?

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

ASSISTANT: Can I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Please let me know your preference?

USER: I want to return from Las Vegas in the afternoon.

ASSISTANT: Ok, may I know your name please?

USER: Christopher Campbell here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thank you for waiting and we have found a flight ticket in an economy class with 1 connection in American airlines and the fare of your flight ticket will be 200. Do you like me to proceed your booking with this flight?

USER: Go ahead to book my ticket.

ASSISTANT: Your ticket is confirmed and your return flight is at afternoon time.

USER: Thank you for your service.

ASSISTANT: Most welcome.