You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Larry Mitchell. I would like to book a flight ticket from NY-LGA to TX-DFW.

ASSISTANT: Sure, can you share your trip dates?

USER: I want to travel on dates 02/21 and 02/23.

ASSISTANT: Do you have any specifications?

USER: I need a halt in between the journey.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.