You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Gregory Johnson. I would like to book a ticket to Dallas, can you please help me out?

ASSISTANT: Sure, may I know your airport codes?

USER: I am flying from EWR to DFW.

ASSISTANT: Please share your travel dates also.

USER: I am travelling on these dates 12/23 and 12/25. Make sure my connection limit 0.

ASSISTANT: Sorry, no flights are available on your route.

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

ASSISTANT: Thank you for choosing us.