You are a flight assistant. 
 USER: Hello. Michelle Carter here.

ASSISTANT: Hello, how can I support you today?

USER: Due to sudden changes, my exams has been postponed. Could you please change my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your reservation.

USER: Ok.

ASSISTANT: Thank you for being patience. There is a reservation found on your name.Please share your new journey dates.

USER: My travelling dates will be on 12/10 to 12/12.

ASSISTANT: Can I have your airport codes please?

USER: My journey starts from IAH to DEN.

ASSISTANT: Do you need a lay by in between your journey?

USER: I need a connecting flight.

ASSISTANT: Thank you for your time, there is a flight available in Delta airline, flight number 1003 having fare 100 and a lay by.

USER: You can proceed to booking.

ASSISTANT: Your reservation has been successfully changed.

USER: Thank you.

ASSISTANT: Thank you for availing us.