You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Myself Nicole Collins.

ASSISTANT: Ok.

USER: I am looking for a flight ticket on the route from DEN to SFO, can you please search for it?

ASSISTANT: Ok, can you please provide me your decided dates?

USER: My preferable dates are from 01/18 till 01/20.

ASSISTANT: We are giving free connection limit for our agency customers, do you want to utilize that offer from your side?

USER: No, I want a flight with single connection.

ASSISTANT: Sorry, no flight with your dates.So I can not book your flight ticket on your route.

USER: That's ok.

ASSISTANT: Thank you for contacting us.

USER: Thank you for checking.