You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit one place that it Denver Center for the Performing Arts in DEN, so please help me in booking a flight ticket.

ASSISTANT: Sure, may I know your preferable dates?

USER: I need to travel from PHL on 05/26 and the return was on 05/28.

ASSISTANT: Sure, may I know your name?

USER: My name is Michelle Phillips.

ASSISTANT: Yes, I found a flight-1023 with AA airlines, can I proceed?

USER: Ok, please book my ticket.

ASSISTANT: Yes, your booking is confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us, have a safe journey.

USER: You are welcome.