You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: William Wilson here. I want to travel from SFO to DEN for attending a business meeting. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: May I know your dates of journey please?

USER: My departure date is 12/19 and return date is 12/21.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: There is flight with the connections limit 0, are you ok with this ticket booking?

USER: Make sure my connections limit is 1.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: Thank you for the information.

ASSISTANT: You are welcome.