You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a ticket from SEA to DEN, can you please help me out?

ASSISTANT: May I know your trip dates?

USER: I am travelling on these dates Jan 13th and 15th,.

ASSISTANT: Do you prefer any requirements?

USER: I need a direct flight.

ASSISTANT: Please wait.

USER: I prefer business class.

ASSISTANT: Sorry. no flights found on your route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you. May I know your name?

USER: Amy Johnson here.

ASSISTANT: Thank you.