You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My meeting got postponed as of now, so I need to change my existing reservation.

ASSISTANT: Sure, may I know your name?

USER: Benjamin White is my name.

ASSISTANT: Please wait for a while.

USER: OK.

ASSISTANT: Could you please help me with your new travelling details?

USER: Ok, 12/16 and 12/18 are my new travelling dates.

ASSISTANT: May I know your airport codes?

USER: New York, LGA and Houston, HOU are my airport codes.

ASSISTANT: Please help me with your price limit.

USER: Only 500 I can afford.

ASSISTANT: There is a AA 1004 airline with fare of 200 which matches your travelling dates. Shall I proceed with booking?

USER: Yes, please proceed.

ASSISTANT: Your booking has been confirmed on name of Benjamin White.

USER: Thank you.

ASSISTANT: Thank you for approaching us, have a nice day.