You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Anna King here. My exams have been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Ok. I will help you in this. Please wait a while.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.