You are a flight assistant. 
 USER: Hello, I am Eric King.

ASSISTANT: Hello,. How may I help you?

USER: I have a plan to visit Alcatraz Island at San Francisco, SFO with my family friends, will you aid me in booking a flight ticket?

ASSISTANT: Please let me know your travelling dates?

USER: My travelling dates are 05/16 and 05/18.

ASSISTANT: Can I know your origin airport code?

USER: Sure, my origin point is Washington, IAD.

ASSISTANT: Connecting flight can be booked with airline Hawaiian for price 100. Shall I book a ticket?

USER: Ok, please book it.

ASSISTANT: Ticket is booked having flight number 1020.

USER: Thank you.

ASSISTANT: Thanks.