You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Williams.

ASSISTANT: How may I help you?

USER: My cricket match got cancelled, so can you help me to cancel my recent reservation?

ASSISTANT: Sure, just a moment please.

USER: Please check my details.

ASSISTANT: I am sorry no reservation found in our database.

USER: That is fine. Thank you for your help.

ASSISTANT: Thank you for choosing us.