You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jacob Roberts here.

ASSISTANT: How may I assist you?

USER: I am planning to travel from ATL to DTW to meet my uncle.

ASSISTANT: Ok. Do you have any preferable dates?

USER: My travel dates are from  06/27 to 06/29.

ASSISTANT: Thank you for your information. There is no flight available as per your details.

USER: That's ok, thank you.

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