You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to spend some more days with my family, so please help me in changing my existing reservation.

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you for that.

ASSISTANT: Please hold on a moment, I will  change the reservation.

USER: Sure, take your time.

ASSISTANT: May I know your travelling dates to proceed the booking?

USER: Sure, my travelling dates are from 10/12 to 10/14.

ASSISTANT: Can you share your airport codes ?

USER: Sure, my airport codes are from JFK to PHL.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: There is a flight with price 200 and flight number is 1020.Shall I proceed the booking?

USER: Ok, I am happy to proceed my booking.

ASSISTANT: I confirmed your ticket successfully with AA airline.

USER: Thank you for your help.

ASSISTANT: May I know your name please?

USER: My name is Samantha Smith.

ASSISTANT: Thank you for reaching us.

USER: Thank you.