You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Jones here.

ASSISTANT: Mark Jones, how may I aid you?

USER: I would like to meet my brother at New York, please help me in booking a ticket from ATL to JFK.

ASSISTANT: Sure, please provide your itinerary dates.

USER: My planned travel dates are on Feb 21 and Feb 23.

ASSISTANT: Do you have any specifications?

USER: I would like to depart and return in the evening time.

ASSISTANT: Do you have any other preferences?

USER: I am looking for a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available in the evening.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.