You are a flight assistant. 
 USER: Hello. I'm Steven Perez.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: I will check with your details and get back to you. Sorry, I could not find any previous reservation.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thanks for approaching us. Your are welcome.