You are a flight assistant. 
 USER: Hello. I am Emily Edwards.

ASSISTANT: Hello, how may I aid you today?

USER: As my meeting with my partners has been postponed, I want to change my existing reservation. Could you help me in changing my existing reservation?

ASSISTANT: Sure, can you please hold a moment.

USER: Ok.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with provided name.

USER: Ok, no issues. Thanks for your quick response.

ASSISTANT: Thank your for opting us, have a great day ahead.