You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need you to book a flight ticket from SEA to EWR. Please help me with it.

ASSISTANT: Sure, I am here to help you. Can you please let me know your travelling dates?

USER: June, 30 and July, 02 are my planned travelling dates.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a break in my journey.

ASSISTANT: Is there any other specifications for you?

USER: I would just prefer to fly in a economy class.

ASSISTANT: May I know your good name?

USER: My name is Justin Miller.

ASSISTANT: We are regret to inform you that, no flights are available on your journey routes.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.