You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am Melissa Phillips want to visit Denver to view painting exhibition. Can you book a ticket?

ASSISTANT: Sure, I will help you. Please share me your journey dates?

USER: My journey dates are 02/10 and 04/10.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a single connection.

ASSISTANT: Kindly mention your airport codes?

USER: I will depart from DC-DCA to CO-DEN.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for your time. There is a direct flight with price of 200 and it is Delta airline. Shall I go with the booking?

USER: No, do not proceed.

ASSISTANT: Ok, booking has been stopped.

USER:  Thank you for providing information.

ASSISTANT: Thanks for opting us, have a great day.