You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Scott Miller.

ASSISTANT: How may I help you?

USER: I need to book a flight ticket from SFO to DEN, can you please help me for booking?

ASSISTANT: Sure, can you please tell me your trip dates?

USER: I would like to travel on Nov 5 to return on Nov 7.

ASSISTANT: Sorry, on these dates there is no flights available.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Most welcome.