You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Benjamin Robinson. Could you make a reservation from DEN to SFO?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are on June 11 and June 13.

ASSISTANT: Do you have any specification?

USER: I need a 1 connection in between journey.

ASSISTANT: Sorry, there is no flight on your details.

USER: Ok, thank you for information.

ASSISTANT: Thank you.