You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Linda Rodriguez. I'm planning to take my kids to Denver Zoo on there holiday vacation, could you help me in making the reservation with the flight having 0 connection?

ASSISTANT: That's good idea, can you provide us your travel dates?

USER: Yes, as there are limited leaves for me, my preferable dates are from 08/29 to 08/31.

ASSISTANT: Ok, may I know your source and destination airport code?

USER: As I stay in Houston, I want to travel from HOU to DEN.

ASSISTANT: Ok, let me check for the available flights.

USER: Ok, please search for the best flight.

ASSISTANT: Sorry Rodriguez, there are no flights available to DEN on 08/29.

USER: That's ok, I will find other means of travel. Thank you for your valuable time.

ASSISTANT: Thank you for contacting us, have a nice day.