You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: Could you help me in booking a flight ticket from DEN to SFO?

ASSISTANT: Sure, please share me your planned journey dates?

USER: I would like to fly on Nov 13, return on Nov 15.

ASSISTANT: Please mention your connection limit?

USER: I want a flight with one connection.

ASSISTANT: Is there any other requirement?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Gary Walker.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: No problem, thank you.

ASSISTANT: Thank you for visiting us, have a nice day ahead.