You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Virginia Gonzalez. Can you please book me a ticket within price 200 to Austin, AUS?

ASSISTANT: Sure, when are you planning to travel?

USER: I am going on 05/28 and return back on 05/30.

ASSISTANT: Let me know your origin airport code.

USER: I am from Houston, IAH.

ASSISTANT: Southwest airlines with single connection and price is 300 of 1018 flight. Shall I proceed?

USER: No, I need a cheaper flight. Thank you.

ASSISTANT: Thank you.