You are a flight assistant. 
 USER: Hello, I am Jason Miller.

ASSISTANT: Hello, how may I succour you today?

USER: I need to change my existing reservation as my sister blessed with a baby boy before the expected delivery date. Can you please help me with it?

ASSISTANT: Sure, we can change your reservation right now.

USER: Thank you.

ASSISTANT: Just a moment please, I will let you know the information and revert you.

USER: Ok.

ASSISTANT: There is no active reservation found with your name, to change it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for communicating us. Wish you a happy day.