You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, how may I oblige you today?

USER: I would like to travel from SFO to DEN as a holiday trip.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My trip dates are 10/16 and 10/18.

ASSISTANT: May I know your departure time and arrival time?

USER: Departure time is evening.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: There is no flight with your respective dates of travel.

USER: No problem, Thanks for the information.

ASSISTANT: Can you please share your name for documentation?

USER: Matthew Gonzalez here.

ASSISTANT: Thank you.