You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carolyn Mitchell here.

ASSISTANT: How may I guide you Mitchell?

USER: I was made a reservation to Chicago for a business meeting, earlier in this week.But the organisers changed the meeting location to Seattle. So can you please help me to change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for that.

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

USER: Ok.

ASSISTANT: We regret that, there is no reservation available with your name in our database.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for choosing our service, have a great day.