You are a flight assistant. 
 USER: Hello. I am Carol Hernandez here.

ASSISTANT: Hello, how may I help you?

USER: I want to book my ticket from Atlanta. Could you please help me with booking a flight ticket from ATL to JFK?

ASSISTANT: Sure, I am happy to help you. May I know your trip dates?

USER: My trip dates are Feb 12 and Feb 14.

ASSISTANT: Ok, do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for a while.

USER: Please make sure that, my depart time should be in the evening.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: Not an issue, thank you for the information.

ASSISTANT: You are most welcome and thank you for choosing us.