You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: As my meeting got postponed at Dallas, can you please help me in changing my existing reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your name to check the reservation status of your reservation?

USER: My name is Richard Martinez.

ASSISTANT: Sorry Richard, there is no active reservations under your name to change.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: You are most welcome, thank you for reaching out here.