You are a flight assistant. 
 USER: Hello. I am Frank Gonzalez.

ASSISTANT: Hello, how may I render you?

USER: Owing to an  emergency I need to change my reservation, can you please help me in changing?

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: No problem,thank you.

ASSISTANT: Thank you for reaching us, have a nice day.