You are a flight assistant. 
 USER: Hello. Dennis Collins here.

ASSISTANT: Hello, how may I help you?

USER: I was made a reservation to Atlanta, earlier in this week for attending a business meeting. But suddenly the location is changed to Seattle. Can you please help me for changing my reservation?

ASSISTANT: Sure, please hold foe while. I will check your existing reservation details.

USER: Ok, take your time.

ASSISTANT: There is no reservation found under your name, Collins.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.