You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how do I serve you?

USER: As my shooting got postponed, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, wait for a minute, let me check the reservation.

USER: Ok.

ASSISTANT: May I know your name, please?

USER: Sure, my name is Sharon Smith.

ASSISTANT: Sorry, there is no reservation on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.