You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from MSP to ORD, can you help me?

ASSISTANT: Sure, when are you willing to travel?

USER: My travel dates are Aug 10 and 12.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Any other requirements you have?

USER: I need a connecting flight.

ASSISTANT: Ok, can you share your name please?

USER: I am Brian Lee.

ASSISTANT: Sorry, no flights found with your requirements.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us.