You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I am James Walker.

ASSISTANT: Ok.

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.