You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a ticket from PHL to SEA. Could you book a ticket?

ASSISTANT: May I know your travel dates?

USER: Departure is on Aug, 3 and return date is Aug, 5.

ASSISTANT: Do you prefer connecting flight?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the evening.

ASSISTANT: May I know your good name?

USER: George Harris.

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

USER: Thank you.

ASSISTANT: Thank you for reaching us.