You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please help me in booking my flight ticket from DFW to SFO?

ASSISTANT: When you are willing to travel?

USER: My travelling dates are Nov 19 and Nov 21.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connection flight.

ASSISTANT: May, I know your good name?

USER: Myself Christopher Jackson.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.