You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Patrick Lopez. I want to attend a Pagan Festival at Denver. Can you help me in my booking?

ASSISTANT: Sure, we are here to help you for booking.

USER: Thank you.

ASSISTANT: Please share your journey dates.

USER: My journey dates are from 10/19 to 10/21.

ASSISTANT: Ok, may I know your journey airport codes?

USER: My airport codes are from SFO to DEN.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights found on that location.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for choosing us.