You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how best can I guide you today?

USER: I need to book a flight ticket from ATL to DFW, Can you please help me with that?

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

USER: I would like to start on 05/14 and return on 05/16.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Can I know your good name?

USER: Donna Harris here.

ASSISTANT: Do you have any preferences?

USER: No preferences.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you.