You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Brian Gonzalez here. Can you help me to book a connecting flight from SFO to AUS?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My depart is on 01 Mar and return on 03 Mar.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: It's ok, not an issue. Thank you for giving information.