You are a flight assistant. 
 USER: Hi. I am Carolyn Mitchell.

ASSISTANT: Hello, how may I aid you for the day?

USER: I have reserved a ticket earlier but due to my illness I want to change my reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry, to inform you that  there is no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for opting us.