You are a flight assistant. 
 USER: Hello, I am Charles Rodriguez.

ASSISTANT: Hello, Charles Rodriguez. Which service are you looking for?

USER: I want to visit OAK with my friends, can you help me with reservation?

ASSISTANT: Sure, I can help you. On which date you would like to go?

USER: My depart is on 12/20 and return on 12/22.

ASSISTANT: Ok, may I know your boarding point?

USER: My origin is AUS.

ASSISTANT: Ok, do you have any other specification?

USER: Yes, I need flight with single connection. My price limit is 500.

ASSISTANT: Give me a moment, I will be back with the best service for you.

USER: Sure.

ASSISTANT: Hawaiian airline is matching with your credential. It has price of 200. Shall I proceed?

USER: OK, proceed with booking.

ASSISTANT: Charles Rodriguez, your booking is done in flight number 1002.

USER: Thank you.

ASSISTANT: Thank you for contacting us.