You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Jeffrey Johnson here. I want to meet my family at Atlanta, so please book a ticket for me from DFW to ATL.

ASSISTANT: Sure, can you help me with your travelling dates?

USER: My trip dates are 05/08 and 05/10.

ASSISTANT: Sorry, there is no flight is available for you.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.