You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: My reservation was done under the name Robert Taylor.

ASSISTANT: Thank you very much. Please wait for a while, let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.