You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in changing my existing reservation, as my meeting got postponed.

ASSISTANT: Sure, please provide your name.

USER: Sure, I am Frank Collins.

ASSISTANT: Let me check your ticket status.

USER: Ok.

ASSISTANT: Sorry Frank Collins, no reservation is available by your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.