You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from DFW to MSP. Please help me in booking my ticket.

ASSISTANT: Can I know your trip dates?

USER: My trip dates are from 11/25 to 11/27.

ASSISTANT: Do you have any other requirements?

USER: My class preference is economy and I need a single connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Jonathan Lewis.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.