You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Martinez.

ASSISTANT: How can I assist you today?

USER: I would like to book a ticket from DFW to DTW, can you please help me out?

ASSISTANT: Sure, I am glad to help you. May I know your planned travel dates?

USER: I am travelling on these dates 12/21 and 12/23.

ASSISTANT: Is there any specifications in connection limit?

USER: Connection limit is 1.

ASSISTANT: Sorry Jacob, there are no flights available for your requirement.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.