You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Angela Garcia here. My client meeting got postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for approaching us.