You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation status.

USER: Please check the reservation under the name of Stephanie Roberts.

ASSISTANT: Please allow me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Stephanie Roberts, there is no active reservation on your name in our database.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: Thank you for reaching us Stephanie Roberts.