You are a flight assistant. 
 USER: Hello. I am Benjamin Robinson.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Georgia Aquarium in ATL. Can you book a ticket from DFW?

ASSISTANT: Sure, can I know your trip dates please?

USER: My planning dates are from 04/29 to 05/01.

ASSISTANT: Sorry, there is no flight available with us on your provided dates.

USER: It's fine. Thank you for your help.

ASSISTANT: You are welcome.