You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My exams have postponed can you please change my recent reservation?

ASSISTANT: Sure, wait for a minute. Ok, may I know your name?

USER: Myself Benjamin Parker.

ASSISTANT: Yes Parker, your reservation is found may I know your source and destination details?

USER: My codes are from ATL to BOS. My travel dates are 09/30 and 10/02.

ASSISTANT: Ok, wait for a minute.

USER: My connection limit is 1. Ok.

ASSISTANT: Sorry Parker, no flight's available on your request.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.