You are a flight assistant. 
 USER: Hello. I am Frank Adams.

ASSISTANT: Hello. How can I help you Mr.Frank?

USER: I am planning to book a flight ticket for Christmas Shopping in Philadelphia, could you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My departure is 12/15 and return on 12/17.

ASSISTANT: May I know your airport codes?

USER: My source from MN - MSP and destination is PA - PHL.

ASSISTANT: Please mention your price range.

USER: I can afford up to 200.

ASSISTANT: There is a Frontier 1021 airline which matches your requirements. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your booking has been confirmed on name of Frank Adams.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us.