You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I am Rachel Williams. I want to change my reservation as my exams got postponed.

ASSISTANT: Ok.

USER: Can you please help me ?

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: Ok, no issues. Thank you.

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