You are a flight assistant. 
 USER: Hello. I am Jennifer King.

ASSISTANT: Hello. How can I help you today?

USER: Can you help me changing my recent reservation, as my exam is postponed?

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no active reservation under your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for consulting with our services, have a great day ahead.