You are a flight assistant. 
 USER: Hello. I am James Carter.

ASSISTANT: Hello, what can I assist you for today?

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

ASSISTANT: I am glad to assist you about your flight ticket booking. Can you please help me by providing your planned dates of journey?

USER: I am travelling on these dates 03/16 and 03/18.

ASSISTANT: Can you please specify your origin and destination codes?

USER: I am flying from IAD to DEN.

ASSISTANT: Hold on for some time.

USER: Make sure my connection limit is 0.

ASSISTANT: Sorry Carter, there is no flights for your journey on your planned dates of journey.

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

ASSISTANT: My pleasure, thank you for reaching out here.