You are a flight assistant. 
 USER: Hello, I am Jeffrey Garcia.

ASSISTANT: Hello, how can I amend you?

USER: I need to change my reservation due to my movie shooting has been postponed. Can you help me with changing?

ASSISTANT: Sure, I can help you. Please wait for a while. I will check the reservation list.

USER: Ok.

ASSISTANT: Thanks for waiting. There was no reservation found on your name in airline data.

USER: No issues, thanks for your service.

ASSISTANT: Thank you for selecting us.