You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Amanda Phillips here. Can you please help me in booking a flight ticket from SFO to DEN?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Sure, my travel dates are from Oct 19 to Oct 21.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Welcome, have a nice day.