You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Jennifer Edwards. I need to change my existing reservation, can you please help me?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you for your kind response.

ASSISTANT: Please allow me a moment.

USER: Please take your time.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: That's ok, thank you for searching the details.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.