You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Lee.

ASSISTANT: How can I aid you today?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I have found your reservation. Can I know your travelling dates?

USER: I would like to take off on 02/21 and return on 02/23.

ASSISTANT: Ok, may I know your airport codes?

USER: My source airport code is MSP and destination airport code is AUS.

ASSISTANT: Ok, wait for a minute.

USER: Sure, take your time.

ASSISTANT: The Delta airlines are providing a flight having a connection limit 1. Can I proceed with the booking?

USER: Please confirm the booking.

ASSISTANT: I have reserved your ticket and the flight number 1019.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for approaching us. Have a safe journey.