You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I made a reservation earlier to visit Heard museum. Due to shortage of holidays I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, Please provide me your name.

USER: My name is Nicole Baker.

ASSISTANT: There is no reservation found with your name.

USER: No issue. Thanks for your kind response.

ASSISTANT: Have a nice day.