You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond King.

ASSISTANT: How may I help you at this moment?

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

ASSISTANT: Sure, I am here to help you. Please wait for a moment to check your details.

USER: Ok.

ASSISTANT: Sorry to say, there is no any active reservation found on your name.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.