You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a flight ticket from DFW to LGA?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Feb 12 and Feb 14 respectively.

ASSISTANT: Is there any connection limit for you?

USER: I prefer for connecting flight.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please help me with your name for booking.

USER: Shirley Davis here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.