You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am John Edwards.

ASSISTANT: Glad to meet you John Edwards.

USER: I want to go Atlanta for my film shooting purpose, can you please book a flight ticket for me?

ASSISTANT: Sure, I am here to help you. May I know your locations?

USER: Thank you. I want to take off from DFW and destination airport is ATL.

ASSISTANT: Ok, can you please share your trip dates too?

USER: I want to take off on 04/30 and please book my return ticket also on 05/02.

ASSISTANT: Sorry, there is no flight with your preferences.

USER: Oh! It's ok no problem. Thank you for your service.

ASSISTANT: Ok, thanks for choosing us.