You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight from ORD to meet my brother. Can you find me a flight to DTW?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: I will fly on Apr 12 and return on Apr 14.

ASSISTANT: Do you need any connections between your trip?

USER: Yes.

ASSISTANT: Do you need any other requirements?

USER: I want my depart flight in afternoon.

ASSISTANT: May I know your name?

USER: My name is Samantha Thompson.

ASSISTANT: I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.