You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to modify my reservation as I am suffering with fever. So, I have planned to travel on some other day. Can you help me with that?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Mary Lopez.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our database to modify.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for approaching us.