You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: Patricia Thomas here. My client meeting has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, please wait a moment. Let me check.

USER: Ok.

ASSISTANT: Sorry, no reservation found with your given name.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.