You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I'm Jack Walker, planning to visit Seattle city. Can you please help me by booking a ticket from OAK to SEA?

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: My preferable journey dates are from 06/28 to 06/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure, please find a flight ticket under 500.

ASSISTANT: There is a flight 1004 in Hawaiian airline has the price 200. Can I proceed with this booking?

USER: Please book my ticket with this flight.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you for booking my ticket.

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