You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Sharon Phillips.

ASSISTANT: Ok.

USER: Can you please change my existing reservation? Because I need to attend the emergency meeting.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your time , there is no reservation found in your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for availing us.