You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How may help you ?

USER: Myself Nicole Perez and I need your help to change an existing reservation.

ASSISTANT:  Just a second Mr Nicole Perez.

USER: OK.

ASSISTANT: I am sorry Mr Nicole Perez , I could not see your reservation .

USER: OK, that's fine.

ASSISTANT: Thank you.

USER: Thank you.