You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

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

ASSISTANT: Sure, I will help you with that. Can  I have your  travel  dates  please?

USER: My trip dates are Dec 14 and Dec 16 respectively.

ASSISTANT: Ok,  please let me  know  your  preferable timings of  your  journey.

USER: I am comfortable to travel at any time.

ASSISTANT: Do you have any other specifications?

USER: I prefer for single connecting flight.

ASSISTANT: Can I have your  good name please?

USER: Samantha King here.

ASSISTANT: Sorry to inform you that  no flight is available to you on your  planned  dates.

USER: Thank you.

ASSISTANT: Thank you for choosing us.