You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Scott Miller.

ASSISTANT: What help is required from my end?

USER: My examination scheduled dates has been postponed.So, I would like to change my recent reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure Scott, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found in my database on your name. Thank you for choosing our service.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: You are welcome.