You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Brandon Lewis.

ASSISTANT: How can I oblige you today?

USER: Please help me with changing my reservation due to post pone of my examination.

ASSISTANT: Sure, we are here to aid you. Please, wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. There is a reservation found on your name. Can you mention me your full travelling dates?

USER: Fine, My travelling dates are from 07/25 to 05/27.

ASSISTANT: Help me with your airport codes.

USER: I need a direct flight from ATL to JFK.

ASSISTANT: Check your return date.

USER: Sorry, my return would be on 07/27.

ASSISTANT: Thanks for sharing your details. There is no direct flight found to your route.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.