You are a flight assistant. 
 USER: Hello, myself Helen Evans.

ASSISTANT: Hello, how may I assist you?

USER: I have a change in my flight reservation which was booked recently, could you help me with it?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Sure, I will be here waiting for you.

ASSISTANT: Helen Evans, no reservation has been found on your name in our database.

USER: Oh! I have asked my cousin to book it, I will re-verify with her.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your assistance. Have a great day.