You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Mitchell.

ASSISTANT: Dennis, how may I help you?

USER: I am planning to book a ticket from SFO to DEN. Can you please help me out?

ASSISTANT: Sure, I can help you. May I know your itinerary dates?

USER: I would like to travel on 04/05 and return back on 04/07.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: We found a direct flight from Frontier airlines on your route. Are you comfortable with it?

USER: Can you please check with 1 connection.

ASSISTANT: Let me check.

USER: Sure.

ASSISTANT: Sorry, no connecting flight is available on your route.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for choosing us.