You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a ticket to attend a meeting at ORD. Can you please help me out to book a ticket from ATL?

ASSISTANT: Yes, I can help you and I need your preferable planned travel dates to find a flight for your. Can you please share it?

USER: I am planning to travel on Oct 07 and return back on Oct 09.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, I am Rachel Martin.

ASSISTANT: Ok, if you have any other specifications with connection limit. Please let me know.

USER: I am looking for a direct flight.

ASSISTANT: Please give me a moment.

USER: I am looking for a business class preference.

ASSISTANT: I regret to inform you that there is no flight on your route due to sold out flight ticket in all the available flights.

USER: That's fine, thank you for your service.

ASSISTANT: You are welcome and have a great day, thank you for opting us.