You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Debra Lopez.

ASSISTANT: How shall I help you?

USER: I would like change my recent reservation to new locations, can you help me over that?

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: No reservation found.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you.