You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I would like to fly to NY to visit Independence Hall, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Sure, I intend to start my journey on 01/26 and my return date will be on 01/28.

ASSISTANT: Please share me your airport codes.

USER: My boarding point is DEN and my landing point is EWR.

ASSISTANT: May I know your name?

USER: i am Richard Edwards.

ASSISTANT: Is there any other specifications?

USER: I want to return in the evening and I prefer to fly in an economy class.

ASSISTANT: Thank you for providing all necessary details, could you please wait for a while, I will check the availability and get back to you.

USER: That's perfect, you can proceed with the booking.

ASSISTANT:   We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.