You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Due to some personal work, I want to make a few changes in my existing reservation. Can you please help help me with this?

ASSISTANT: Sure, I am gleeful to assist you.

USER: Thank you.

ASSISTANT: Please stand by.

USER: I am Laura Collins. Sure, I will wait.

ASSISTANT: Thank you for providing your name, sorry to say no reservation found on your name.

USER: Ok. Thank you for your service.

ASSISTANT: Thank you for reaching us, have a nice day.