You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jack Johnson here.

ASSISTANT: How may I assist you today?

USER: My wedding has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure.

ASSISTANT: I have found your reservation, please provide your new journey dates.

USER: My itinerary dates are 02/16 and 02/18.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: My genesis and terminus airport codes are DCA and EWR.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok.

ASSISTANT: I have found a flight with 1 connection with the fare of 100 provided by UA airlines. Shall I proceed with this?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1009.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a great journey.