You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: How can I book a flight ticket for my brother to Austin, TX - AUS from San Francisco, CA - SFO?

ASSISTANT: I will help you with this. Can you please provide your travel dates?

USER: Ok, please book for the dates 01/07 and 01/09.

ASSISTANT: Sorry to tell you that, there are no flights available in your route as per your travel dates.

USER: That is ok. Thank you for assisting me.

ASSISTANT: You are welcome, thank you for reaching us. Have a great day. May I know your name please?

USER: Ok, my name is Stephen Turner.

ASSISTANT: Thank you for providing your name, have a great day.