You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Richard Clark here. My interview has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Ok. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.