You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you for the day?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, we are gleeful to assist you. May I know your name please?

USER: My name is Cynthia Anderson.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry we did not find any reservation against your name.

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

ASSISTANT: Thank you for reaching us. Have a good day.