You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I succour you?

USER: I am Rebecca Johnson, Please change my reservation due to sudden change in the plan of my trip.

ASSISTANT: Sure, let me check the current status and get back to you.

USER: Ok.

ASSISTANT: We could not find any reservation by the name given.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.