You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Emily Young. I just want to change my existing reservation, can you please help me?

ASSISTANT: I am here to assist you with that, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation been found on your name. So I can not amend it.

USER: Ok, may be my friend has been changed previously. Anyway thank you for your information.

ASSISTANT: Thank you for connecting with our agency.