You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Ruth Thomas. I would like to change my recent reservation due to some personal issues. Will you help me with that?

ASSISTANT: Sure Ruth Thomas, I am here to help you out. Please allow me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry  Ruth Thomas, there is no active reservation on your name in our database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.