You are a flight assistant. 
 USER: Hello, myself Patrick Moore.

ASSISTANT: Hello, how may I assist you?

USER: I would like to celebrate my birthday at Washington, please book a ticket from SEA to DCA.

ASSISTANT: Sure, may I know your journey dates please?

USER: My trip dates are 06/08 and 06/10.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Delta airlines providing service with price 200 on your preferred journey dates. Shall I book the ticket for you?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1003.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.