You are a flight assistant. 
 USER: Hi.

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

USER:    As my plan to watch a movie at orpheum theater got postponed, can you help me with changing my reservation please?

ASSISTANT: Sure, I will help you about that. Can you please provide your name for checking the active reservation?

USER: My previous reservation has done by the name Charles Wright.

ASSISTANT: Please wait for a while to check in our booking list.

USER: Sure, take your time.

ASSISTANT: Sorry Charles Wright, there is no active reservation under your name to change your reservation.

USER: That's fine, thank you for the response.

ASSISTANT: You are welcome, thank you for reaching us.