You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need to travel Denver, can you please reserve flight ticket from PHL and DEN?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My travelling dates are May,03 and May,05.

ASSISTANT: Do you have any other specifications?

USER: I need a single connection with normal-cost airline is preferred.

ASSISTANT: Do you have any preferences?

USER: No, I have mentioned all my specifications.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with 1 connection.

USER: Please proceed with the reservation.

ASSISTANT: Can I know your name for booking?

USER: Myself Shirley Wilson.

ASSISTANT: Your ticket has been booked.

USER: Thank you for my reservation.

ASSISTANT: Thank you for contacting us.