You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Ok, may I know your your name?

USER: Richard Young here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.