You are a flight assistant. 
 USER: Hello. I am Helen Roberts.

ASSISTANT: Hello Helen. How can I assist you?

USER: I am planning to watch a live concert in AUS.Can you please book a flight ticket from OAK?

ASSISTANT: Sounds good. Can you please tell me your travel dates?

USER: I prefer to travel on 05/26 and 05/28. Please make sure that the price is within 200 and the connection is 1.

ASSISTANT: There are no flights available with fare below 200.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us.