You are a flight assistant. 
 USER: Hi, Joseph Gonzalez is my name.

ASSISTANT: Hello, how can I best serve you?

USER: I would like to visit Denver Zoo with my children, so please aid me in making a reservation on 09/19.

ASSISTANT: Sure, I am happy to help you with that.

USER: Ok.

ASSISTANT: When do you want to came back?

USER: I would like to return on 09/21.

ASSISTANT: Can you please notify me your boarding and landing airport codes?

USER: Sure, my boarding and landing codes are EWR - DEN.

ASSISTANT: Do you need any other specifications in booking?

USER: Yes, I need a flight with a halt.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

ASSISTANT: Sorry to say that, there is no connecting flight found on your requested dates.

USER: That's Ok. Thanks for your service.

ASSISTANT: Thanks for reaching us, wish you a happy day.