You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Jessica Harris here. I need to change my existing reservation as my sister blessed with a baby before the expected delivery date.

ASSISTANT: Please give me a minute, I will find your existing reservation.

USER: Ok sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great day.

USER: Most welcome.