You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: It's my pleasure to help you, please tell me your name.

USER: My name is Donald Baker.

ASSISTANT: There is no reservation found on your name, Donald.

USER: No problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.