You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Clark.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: Steven, there is no reservation found under your name.

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

ASSISTANT: Thank you for reaching us.