You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Prepone plan came into a picture owing to announcement of birth of baby boy. Can you please help me to change an existing reservation?

ASSISTANT: Sure, let me know your name to check the status of your reservation?

USER: My name is Ruth Williams.

ASSISTANT: Sorry, we did not find any reservation on your name.

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

ASSISTANT: Thank you for reaching us.