You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Thomas here.

ASSISTANT: How can I aid you?

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

ASSISTANT: Sure, may I know your nearest airport codes please? We didn't found any active reservation in your name.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.