You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Stephen Scott. I want to change my existing reservation due to my convocation dates have been changed. Can you help me in this?

ASSISTANT: Sure, we are blissful to help you to change your reservation.

USER: Thank you.

ASSISTANT: Please wait, I will check the status of your earlier reservation.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on the name of Stephen Scott.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for reaching us.