You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I will help you in changing of reservation.

USER: Thank you.

ASSISTANT: Sorry Lopez, there is no reservation found under your name to change it.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: You are welcome always.