You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I have a plan to visit Seattle. Can you help me in booking flight ticket from OAK to SEA?

ASSISTANT: Can I know your travelling dates.

USER: My trip dates are Sept 15 to Sept 17.

ASSISTANT: Let me know your name.

USER: Myself Dorothy Perez.

ASSISTANT: Do you have any preference?

USER: I want to fly in normal cost.

ASSISTANT: Connecting flight can be booked with airline Hawaiian for price 500 having flight number 1025. Shall I book a ticket?

USER: I need a direct flight.

ASSISTANT: Sorry, no flights found.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.