You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency, I want to change my reservation. Can you please help me with that?

ASSISTANT: Sure, may I know your name please?

USER: I am Jack Phillips.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Phillips, there is no reservation found as per your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.