You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Betty Lopez. I am planning to attend a live music concert in Minneapolis & st. Paul, can you please help me in booking a flight ticket from ORD to MSP?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My travelling dates are Oct 18 and Oct 20.

ASSISTANT: Ok, please give me a moment. In the meanwhile, tell me if you have any other specifications?

USER: My departure time is afternoon.

ASSISTANT: Sorry to inform you, there is no flight found on your route with your preferences.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for contacting us.