You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Kevin Wright.

ASSISTANT: How can I assist you?

USER: I am planning to meet my childhood friend's. Can you please help me in reserving the ticket from DEN to ORD?

ASSISTANT: Sure, can I know the travel dates please?

USER: I am planning my trip on Apr 23, and again I will return back on Apr 25.

ASSISTANT: Could you please provide the departure and return time?

USER: My return time is afternoon.

ASSISTANT: Do you have any requirements?

USER: I am flexible with single connection.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.