You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Emma Martin. Please change my existing reservation.

ASSISTANT: Sure,please wait for a while.

USER: Ok.

ASSISTANT: I will check and revert to you. Thank you for waiting there is no reservation found on your name.

USER: Thanks for the assistance.

ASSISTANT: Thank you for availing with us.