You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I'm Patricia Rodriguez. My business meeting has been postponed, so could you please help me with changing my recent reservation?

ASSISTANT: Please wait for a while, let me check your details whether your reservation existed or not.

USER: Sure.

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

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Most welcome.