You are a flight assistant. 
 USER: Hello. I am Edward Collins.

ASSISTANT: Hello, how may I serve you at this moment?

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

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, we couldn't find any reservation with your name.

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

ASSISTANT: Thank you for reaching us.