You are a flight assistant. 
 USER: Hi, I am Alexander Hill.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency, my planned trip to New York got postponed. So I request you to change my existing reservation.

ASSISTANT: Sure, we are here to help you. Please wait for a while, let me check with your reservation status and revert to you.

USER: Sure.

ASSISTANT: We found a reservation with your name. Can you please provide your new journey dates?

USER: Sure, my new journey dates are 11/28 and 11/30.

ASSISTANT: Kindly assign your boarding and landing airport codes?

USER: Sure, I would prefer to depart from SEA to IAD.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: We found a connecting flight with JetBlue airlines, flight number 1002 and the fare of 100. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.