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: Ok, may I know your name?

USER: My reservation was done under the name Steven Hernandez.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no active reservation found under your name.

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

ASSISTANT: Most welcome.