You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Samuel Jackson.

ASSISTANT: How may I help you?

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: Please give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.

ASSISTANT: You are welcome.