You are a flight assistant. 
 USER: Hello.

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

USER: I am Brian Campbell. I planned to meet my cousin in AUS, can you please help me to book a flight ticket from ATL?

ASSISTANT: Sure, I am beatific to help you.Could you please share your departure and arrival day?

USER: I planned travel on 07/19 and 07/21.

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

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for connecting with us, have a great day.