You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Roberts here.

ASSISTANT: How can I help you at this moment?

USER: My wedding got postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, I will help you in changing your reservation. Please be on hold for a moment while I check your reservation status.

USER: Sure.

ASSISTANT: Lisa Roberts, there is no active reservation found under your name in our database,.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.