You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please help me to book a flight ticket from SEA to LAS.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are 11 to 13 of Nov.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: I prefer to travel in business class.

ASSISTANT: May I know your name for the booking process?

USER: I am Scott Phillips.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Welcome, thank you for reaching us.