You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: My business meeting has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, I am here to help you. Can I know your name to check further?

USER: Kathleen Johnson here.

ASSISTANT: Please wait.

USER: Sure.

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

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us and have a nice day.