You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: Rachel Evans here.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Rachel Evans, we haven't found any reservation under your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us.