You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.