You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to book a connecting flight ticket to attend an client meeting at NY. Can you help me?

ASSISTANT: May I know your desired travel dates please?

USER: Dec 28th and 31st are my travelling dates.

ASSISTANT: Please share your preferred airport codes.

USER: DEN and EWR are my airport codes.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Karen Hernandez.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for opting us.