You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I helpful to you?

USER: I want to meet my cousin on her birthday at Philadelphia on 06/01 and return on 06/03, can you book me flight ticket?

ASSISTANT: Yeah. May I know your airport codes?

USER: Yes, I would like to travel from PHL to DEN.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: May I know your name?

USER: Yes, my name is Matthew Lewis.

ASSISTANT: Do you have any other specifications?

USER: My price should be under 200. I need a connection in between.

ASSISTANT: ok. Thank you for providing details Lewis. We found a AA airline with flight number 1022. Flight is matching your requirement,shall I proceed for booking?

USER: Please proceed with this booking.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing our service.