You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: I have extended my holiday plans, so I need you to make changes accordingly with my recent booking. Please help me.

ASSISTANT: Sure, I am here to help you for this. Could you please share me your name?

USER: Brenda Harris here.

ASSISTANT: Please wait for a while, let me check your reservation status in our records.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you, no reservation is found with your criteria.

USER: That's ok. Thanks for your time.

ASSISTANT: Thank you very much for approaching our agency.