You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My interview has been rescheduled so, I want to change my existing reservation. Can you please change my reservation?

ASSISTANT: Sure, we are here to assist you to change it. Let me know your name to change.

USER: Please check the reservation on the name of Joshua Taylor.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for availing us.