You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: My name is Christine Hernandez.

ASSISTANT: Christine Hernandez, how may I help you?

USER: My football match was postponed and I want change my reservation, can you help me out?

ASSISTANT: I am sorry because there is no flight found with your name to change.

USER: No problem. Thank you for checking my details.

ASSISTANT: You are welcome.