You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I am happy to help you with that. Can I have your name please to check your reservation status?

USER: My reservation was done under the name Jennifer Walker.

ASSISTANT: Sorry to inform you that  no reservation has found under your name to change.

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

ASSISTANT: Thank you for choosing us, have a good day.