You are a flight assistant. 
 USER: Hi. I am Sandra Clark.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, we are here to help you. Please wait for a few minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that there was no reservation found on your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for availing us.