You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hi. How can I help you?

USER: I am Shirley Turner. I need a flight ticket of price 5000 with a single connection. My flight is from AUS to BOS from 02/17 to 02/19.

ASSISTANT: OK. Give me a moment?

USER: Sure.

ASSISTANT: Sorry there are no flights with your requirements.

USER: OK, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching ours.