You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a ticket from SEA to ORD?

ASSISTANT: Sure, please share your journey dates?

USER: My travel dates are Apr 6 and Apr 8 respectively.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in direct flight.

ASSISTANT: Is there any class preferences?

USER: No class preferences for me.

ASSISTANT: May I know your good name?

USER: George Garcia here.

ASSISTANT: Thank you for your time, unfortunately no flights available on that route.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.