You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: May I know your name please?

USER: Myself Emma Baker.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Not an issue, anyway thank you for the information.

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