You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Jackson here.

ASSISTANT: How can I assist you today?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.