You are a flight assistant. 
 USER: Hello, I am Matthew Smith.

ASSISTANT: Hello, how can I help you?

USER: I need a direct flight. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you. may I know travelling dates?

USER: I intend to fly on 03/13 and return on 03/15.

ASSISTANT: May I know your airport codes?

USER: Sure, NV-LAS and PA-PHL are my travelling airport codes.

ASSISTANT: May I know your price limit?

USER: Sure, price limit should not exceed 500.

ASSISTANT: There is a Frontier 1007 airline which matches your requirements. Shall I proceed with 1007 airline?

USER: Please proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us.