You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you please help me in booking my flight ticket from DEN to LGA?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My journey dates are Aug 11 and Aug 13.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: Nothing to share with you. Thanks for asking.

ASSISTANT: May I know your name to proceed further?

USER: Myself Kathleen Robinson.

ASSISTANT: Kathleen Robinson, there are no flight services available on this route on your provided dates.

USER: Thanks for your information.

ASSISTANT: Thank you for contacting us.