You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to book a ticket from LAX to SEA. Could you book a ticket?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Travelling dates are from June, 13 to June, 15.

ASSISTANT: Do you prefer either an economy or business class?

USER: I prefer business class.

ASSISTANT: Do you have any connection limit for this trip?

USER: I need connecting flight.

ASSISTANT: Do you have any another specifications?

USER: I would like to return in the evening time.

ASSISTANT: May I know your name for further process?

USER: My name is Robert Adams.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.