You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I will help you. Can I have your name please?

USER: I am Anna Wright.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Anna Wright, no reservation has been found on your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.