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, may I know your name please?

USER: My reservation was done under the name Samuel Nelson.

ASSISTANT: I am sorry no reservation found on your name?

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

ASSISTANT: Thank you for choosing us.