You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: May I know your name?

USER: My reservation was done under the name Karen Hill.

ASSISTANT: Sorry, we did not found any reservations under your name.

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

ASSISTANT: Thank you for reaching us.