You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I made a reservation earlier to attend a family meeting but due to heavy work load I could not attend.

ASSISTANT: Ok.

USER: Can you help me in changing my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for your response.

ASSISTANT: May I know your good name?

USER: Sure, I am Jacob Anderson.

ASSISTANT: Please, stay online. I will check the previous list and let you know.

USER: Sure.

ASSISTANT: Thank you for your valuable time. We are sorry to inform you that, No reservation found on your name.

USER: Ok, no issues. Thank you.

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