You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Myself Anthony Nelson.

ASSISTANT: Nice to meet you Anthony Nelson, do you want any help from me?

USER: I want to change my current reservation due to family function. Can you help me?

ASSISTANT: Sure, just hold on, I will check it and let you know about your previous reservation.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our records.

USER: That's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for helping me.

ASSISTANT: My pleasure.