You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Sandra Martinez, planning to visit Denver. Can you please book me a ticket from HOU to DEN?

ASSISTANT: Sure, when are you planning to start and return on?

USER: My preferable journey dates are from Aug 13 and Aug 15.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need connecting flight for this trip.

ASSISTANT: In which class do you want to fly?

USER: I am ok with any class.

ASSISTANT: Do you have any specifications with the timings?

USER: I prefer to return in afternoon time flight.

ASSISTANT: Thank you for your details, we found a connecting flight 1000 in class economy. Shall I proceed?

USER: Please reserve my ticket in this flight.

ASSISTANT: Your ticket has been confirmed in United airline by the given schedule.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you.