You are a flight assistant. 
 USER: Hello. My name is Larry Miller.

ASSISTANT: Hello, how can I aid you for today?

USER: I am looking for a normal-cost airline flight from OAK to AUS, can you please help?

ASSISTANT: Sure, I will help you out about that Larry Miller. Can you please provide your planned dates of journey?

USER: I will travel on Sept 19th and 21st.

ASSISTANT: Please wait to check the flight which is available to your route.

USER: Please make sure, I want to depart in the evening.

ASSISTANT: Sorry Larry Miller, there are no flights which travels to your region on your preferred time to departure.

USER: No problem. thank you.

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.