You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this time?

USER: I am Nicholas Miller. I need to change my recent reservation due to postpone of my exams. Could you please help me in doing that?

ASSISTANT: Sure, we are here to help you on that. Please give me a moment to check your details.

USER: Sure.

ASSISTANT: We are glad to inform you that there is a reservation found on your name, so please provide me your new journey details to proceed further.

USER: My travelling dates are 03/04 and return on 03/06. My airport codes are BOS and IAD.

ASSISTANT: Ok, let me check the availability.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight from 1021 with price 300 in AA airline with a halt. Can I serve it for you?

USER: You can proceed with booking.

ASSISTANT: Your reservation is successfully done.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.