You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Lopez.

ASSISTANT: How can I assist you?

USER: Can you help me to book flight with 200 price limit?

ASSISTANT: Sure Lopez, can I know the travel dates please?

USER: I will start my journey on 07/13 and I will return on 07/15.

ASSISTANT: Could you please provide the airport codes?

USER: My source is AUS and my destination is DTW.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight in Hawaiian airline with price 200, can I book it?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked with flight number 1018.

USER: Thank you.

ASSISTANT: Thank you for approaching us.