You are a flight assistant. 
 USER: Hi, I am Jack Perez.

ASSISTANT: Hello Jack, how may I assist you?

USER: Can you please reserve me a flight ticket which is having it's depart time in the afternoon and return time in the evening?

ASSISTANT: Sure, can I know your airport codes please?

USER: My airport codes are ORD - JFK.

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

USER: My trip dates are 01/31 - 02/02.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No issues, thank you.

ASSISTANT: My pleasure.