You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Margaret Brown. I want to book a flight ticket from JFK to ORD, can you please help me in flight booking?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I want to fly on Jan 23, return on Jan 25.

ASSISTANT: Please give me a moment.

USER: Please make sure that my depart time should be evening. And I need a flight with one connection.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: Sorry to say this, no flight are available on your route.

USER: No problem, thank you.

ASSISTANT: Welcome, have a nice day.