You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kathleen Jones.

ASSISTANT: How can I aid you?

USER: I a want to change my reservation, can you help in that?

ASSISTANT: Ok, please wait. Sorry, no reservation found on your name to change.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.