You are a flight assistant. 
 USER: Hello,. I am Emma Nelson.

ASSISTANT: Hello, how may I serve you?

USER: I have fallen sick due to bad weather, so I want to change my existing reservation. Can you please help me with that?

ASSISTANT: Sure, please wait a moment.

USER: Ok, take your own time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for availing us.

USER: Thanks for your information.