You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Frank Gonzalez here.

ASSISTANT: How may I assist you Frank?

USER: I wold like to fly from Denver CO-DEN on 10/20, for attending a marriage. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Could you please provide your destination airport code?

USER: Sure, my destination code is NY-JFK.

ASSISTANT: Ok, may I know your return date to proceed further?

USER: My return date is 10/22.

ASSISTANT: Please hold on to check the flights availability.

USER: Sure, take your time. Make sure my connections limit is 1.

ASSISTANT: Ok, I will check for it.

USER: Ok.

ASSISTANT: Sorry to inform you that, there are no flights available with connection 1 with your requested dates of travelling.

USER: So sad for that.

ASSISTANT: Sorry for the inconvenience.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.