You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in reserving my flight from DEN to reach SFO?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are Aug 2nd and Aug 4th.

ASSISTANT: Please share your connection limit.

USER: I prefer a single flag over in my journey.

ASSISTANT: Do you have class preference?

USER: I don't have any more preference.

ASSISTANT: May I know your name?

USER: My name is Robert Moore.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Ok, not a problem. Anyways, thanks for the information.

ASSISTANT: Thank you for choosing us.