You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Melissa Lee.

ASSISTANT: How can I assist you at this moment?

USER: Yesterday I booked a ticket to New York through your agency, your agent by mistakenly booked a ticket on wrong dates, so I want to change my reservation.

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Melissa Lee, I have found your reservation. Can you please provide your nearest airport codes of travelling?

USER: My travelling airport codes are SFO to MSP.

ASSISTANT: May I know your planned dates of journey please?

USER: My planned travel dates are 02/02 and 02/04.

ASSISTANT: Delta airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket is booked with flight number 1007.

USER: Thank you for booking.

ASSISTANT: Thank you, have a safe journey.