You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brenda Scott.

ASSISTANT: How may I help you?

USER: I want to change my existing reservation, due to sudden rainfall at my source. Can you please help me with this?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, not an issue.

ASSISTANT: Thanks.

USER: Thanks for the information.