You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: My name is Mary Lopez, I want to change my reservation as my plan to visit my brother at New York is postponed. Can you change my reservation with new dates?

ASSISTANT: Sure, we are here to help you. Please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.