You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER:  I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Ok, wait a minute.

USER: Sure.

ASSISTANT: We found your reservation, can you provide your new journey details?

USER: My new journey dates are 04/18 and 04/20.

ASSISTANT: Ok.

USER: Source: EWR. OAK is the destination point.

ASSISTANT: May I know your name?

USER: My name is Jessica Jackson.

ASSISTANT: We found a flight on spirit airline, flight number as 1015 with the fare of 100. Shall I proceed?

USER: Ok, book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your support.

ASSISTANT: Thank you for availing us.