You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kathleen Hill here.

ASSISTANT: How can I help you today?

USER: Can you please reserve a flight ticket from DTW to ORD for my business meeting?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: Ok, my departure is on Mar 25 and please book my return ticket also on Mar 27.

ASSISTANT: Let me know your departure time and return time.

USER: I would like to return at afternoon time.

ASSISTANT: Do you have any specification?

USER: I will prefer single connection for my journey.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.