You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Pamela Miller here.

ASSISTANT: How may I help you Pamela?

USER: I was made a reservation earlier in this week.Suddenly my business meeting is changed from Chicago to Atlanta. So can you please help me for changing the reservation?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please hold on a moment to check your previous reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry Pamela, there is no previous reservation found under your name in our records.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.