You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: I would like to travel from DEN to PHX as a business trip, can you do the reservation?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My journey dates are 07/04 and 07/06.

ASSISTANT: Do you have any other specifications?

USER: Departure time should be morning.

ASSISTANT: Please help me with your name for booking.

USER: Helen White here.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No issue, thanks for the information.

ASSISTANT: Thank you for choosing us.