You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Ruth Gonzalez here. Please help me out in changing the reservation due to postponed of my exams.

ASSISTANT: Sure, please hold on a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.