You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you at this moment?

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

ASSISTANT: Sure, may I know your name?

USER: I am Jerry Brown.

ASSISTANT: Please allow me a moment to check the reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no active reservation found with your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.