You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Jonathan Robinson here. My interview got postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, I am very glad to help you.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name in our database.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.