You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Robert Lopez here, my interview has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: sure, we are perky to help you.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.