You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I am planning to visit Las Vegas, can you please book me a ticket from SEA to LAS?

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

USER: My preferable journey dates are Mar 25 and Mar 27.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I am ok with any timings.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Please book the ticket with my name Amy Evans.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight for this trip.

ASSISTANT: Any other preferences do you have?

USER: I prefer business class for this journey.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: There are no flights moving towards your region with your requested preferences.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us, have a great day.