You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have to change my previous flight ticket booking, can you please help me with that one?

ASSISTANT: Let me know your name.

USER: Thank you and my name is Anna Edwards.

ASSISTANT: Sorry, no reservation found by your name.

USER: Not a problem with that one, thank you for checking my previous reservation.

ASSISTANT: Thank you.