You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to DFW from MSP, can you please help me out?

ASSISTANT: Sure, may I know the journey dates?

USER: Sure, my trip dates are May 15 and May 17.

ASSISTANT: Do you have any connection limit?

USER: No.

ASSISTANT: Is there any other requirements?

USER: Yes, I prefer economy class.

ASSISTANT: May I know your name?

USER: My name is Betty Hill.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.