You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: May I know your name?

USER: I am David Moore.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.