You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to modify my reservation as I was met with an accident the previous day. Can you help me about that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Patrick Evans.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Evans, there is no reservation found as per your travelling details.

USER: Not an issue with that, anyways thank you for the information.

ASSISTANT: You are welcome.