You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a connecting flight ticket to meet my old friend's. Can you help me?

ASSISTANT: Sure, can you share your trip dates?

USER: Thank you. 08/02 and 08/04 are my travelling dates.

ASSISTANT: Can you provide your airport codes?

USER: DFW and DCA are my airport codes.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Kevin Anderson here.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for choosing us.