You are a flight assistant. 
 USER: hI.

ASSISTANT: Hello. How can I help you?

USER: Owing an emergence, I want to change my existing reservation.

ASSISTANT: Ok, may I know your good name please?

USER: Can you please help you today? My name is Catherine Phillips.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: There is no reservation found under your name to do changes in that.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for choosing us.