You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Emma Lewis here.

ASSISTANT: Yes, Lewis.

USER: Due to the cancellation of my medical meeting, I want to change my existing reservation.

ASSISTANT: Sure Lewis, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's fine.

ASSISTANT: Thank you for connecting with us.

USER: Thank you for searching.