You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to sudden change in the event location, I would like to change my reservation to new location. Can you help me?

ASSISTANT: Sure, I am here to help you to change that reservation. But, I need your name to check that reservation details?

USER: My name is Jack Turner.

ASSISTANT: Sorry, I cannot find any reservation in our database with Jack Turner.

USER: That's fine, thank you for the information.

ASSISTANT: It's my pleasure.