You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in booking a flight ticket from Dallas, DFW to Charlotte, CLT?

ASSISTANT: Sure, when do you want to start and return on?

USER: My journey dates are from May 21 to May 23.

ASSISTANT: Do you have any other specifications?

USER: I need a lay by in between my journey.

ASSISTANT: Can I know your good name?

USER: My name is George Nelson.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you.