You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: How can I know if you can change my reservation which I had recently?

ASSISTANT: I will be helping you with the previous reservation, can you please mention your name?

USER: My name is Joseph Lewis.

ASSISTANT: Please wait a moment.

USER: Ok, please take your own time.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: That is ok, thank you for the help in providing the information.

ASSISTANT: Thank you for reaching our service.