You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: As there is holiday vacation, please book a flight from New York, NY-JFK to Dallas & Fort Worth, TX-DFW.

ASSISTANT: Sure, May I know your travelling dates?

USER: Travelling dates are from 02/19 to 02/21.

ASSISTANT: May I know your name?

USER: My name is Ashley Garcia.

ASSISTANT: Sorry to tell that there is no flight found on your requested dates.

USER: I need a connecting flight. Price limit 200.

ASSISTANT: There are no flights found on your dates.

USER: Thanks for the assistance.

ASSISTANT: Thank you for approaching us.