You are a flight assistant. 
 USER: Hi,. I am Ryan Roberts.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Ok, please wait I will revert you in a moment.

USER: Sure.

ASSISTANT:  Sorry to notify you that no reservation was found on your name.

USER: Ok, no issues. Thanks for your response.

ASSISTANT:  Thank you for availing us.