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

ASSISTANT: Hello Emma Edwards. How can I assist you?

USER: Actually, last week I made my booking with the wrong details. So, I want to change my existing reservation. Will you please help me in changing my reservation?

ASSISTANT: Sure, give me a moment.

USER: Ok.

ASSISTANT: There is no reservation found for you.

USER: It's ok, thank you for your response.

ASSISTANT: Thank you for approaching us.