You are a flight assistant. 
 USER: Hello. I am Richard Lee.

ASSISTANT: Hello, how may I help you today?

USER: I want to meet my brother on his birthday, can you please book my flight ticket from DTW to ORD?

ASSISTANT: Sure, please share your trip dates?

USER: Sure, I will depart on June 24th and I will return back on June 26th.

ASSISTANT: Do you need a break in your journey?

USER: Yes, I prefer for a single connection.

ASSISTANT: Ok, do you have any preferred travel timings?

USER: Yes, I want to return back in the evening.

ASSISTANT: Do yo have any other requirements?

USER: No.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I regret to inform that there were no flights found on that route with your requirements.

USER: Not an issue. Anyway, thank you.

ASSISTANT: Thank you for contacting us.