You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how may I oblige you today?

USER: Owing an emergence, I want to change my existing reservation. Can you help me with it?

ASSISTANT: Ok, please provide you name.

USER: My name is Jason Taylor.

ASSISTANT: Thank you for providing your name, please wait. Sorry, we could not find any reservation.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us.