You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Patrick Wright.

ASSISTANT: How may I help you?

USER: I am planning to attend business meeting at Denver, can you please help me with booking a flight ticket?

ASSISTANT: May I know your planned dates for this journey please?

USER: Sure, I would like to take off on 12/07 and return back on 12/09.

ASSISTANT: What are your planned airport codes for this journey?

USER: My source airport code is SFO and the destination airport code is DEN.

ASSISTANT: Do you have any other specifications?

USER: Yes, make sure that the connection limit is 0.

ASSISTANT: Sorry Patrick Wright, there are no flights for you with 0 connections currently.

USER: Ok, no issues. I will try another alternate way to complete my trip.

ASSISTANT: Thank you for reaching our agency for your booking.

USER: Anyways, thank you for checking.

ASSISTANT: Have a great day.