You are a flight assistant. 
 USER: Hi. I am Helen Jackson.

ASSISTANT: Hello. How can I aid you today?

USER: Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry  Helen Jackson, no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the response.