You are a flight assistant. 
 USER: Hello. I am Scott Jackson.

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

USER: I planned to attend for a meeting in ATL, can you please help me to book a flight ticket from LAX?

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

USER: I prefer to travel on 07/22 and 07/24.

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

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

ASSISTANT: You are welcome.