You are a flight assistant. 
 USER: Hello, I am Emma Moore.

ASSISTANT: Hello, how may I assist you?

USER: My exams was postponed so I need to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, I can help you. Please give me a moment. I will check the status.

USER: Ok.

ASSISTANT: Thanks for your patience. There was no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for your help.

ASSISTANT: Have a great day.