You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Christopher king here.

ASSISTANT: How can I support you King?

USER: I was made a reservation to Washington for attending a meeting.But suddenly the organisers changed the location to Philadelphia. So can you please help me for changing the reservation?

ASSISTANT: Sure King, please wait for a while.

USER: Ok, take your time.

ASSISTANT:  I have checked and see that there is no reservation found under your name.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for reaching our our agency.