You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: Raymond Hernandez here. I am a politician, my meeting with Donald Trump has been postponed. So I want to reschedule my itinerary dates.

ASSISTANT: Sure, we are happy to help you.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: No problem, thank you.

ASSISTANT: Thanks for contacting us.