You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me with booking a flight ticket from SFO to DEN?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are from July 03-05.

ASSISTANT: Do you have any specifications?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know your good name?

USER: Mark Jones here.

ASSISTANT: Sorry, no flights found on your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.