You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I serve you today?

USER: Please change my existing reservation owing to an emergency.

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

USER: My name is Ronald Jackson.

ASSISTANT: k, please wait for some time. There is no recent reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.