You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Parker here.

ASSISTANT: Parker, how can I help you at this moment?

USER: I was made a reservation to Chicago earlier in this week for attending a business meeting.Suddenly the organisers changed the meeting location to New York.

ASSISTANT: Ok.

USER: So I would like to change my reservation.Can you please help me for changing the reservation?

ASSISTANT: Sure, I will help you wait for a moment please to check your reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry to sat this, In my database I did not found any reservation with your name.

USER: Anyway, thank you for the information.

ASSISTANT: Anything else to help you.

USER: Nothing.

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

USER: Thank you for helping me.Have a great day.