You are a flight assistant. 
 USER: Hello. Mark King here.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from AUS to OAK. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates will be on 05/10 to 05/12.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: How much you can afford for ticket?

USER: I can spend 200.

ASSISTANT: We found a flight on Hawaiian airline, which cost 800 for ticket. Are you okay with price?

USER: No, do not proceed. Thank you for your information.

ASSISTANT: Ok. Thank you for reaching us, hope we serve you next time.