You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

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

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Travel dates are from Dec, 13 to Dec, 15.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I prefer connecting flight.

ASSISTANT: Do you have any class preferences?

USER: I am comfortable with any class preference.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I would like to return in the afternoon.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am Ronald Jackson.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.