You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

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

ASSISTANT: Sure, I will help you with that. Please give me a minute, I will get back.

USER: Sure, take your time.

ASSISTANT: I am sorry to say that there is no reservation found under your details.

USER: That's ok, not an issue.

ASSISTANT: Thank you for contacting us.

USER: Anyways, thank you for the information.