You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sarah Garcia.

ASSISTANT: How can I help you?

USER: I want to cancel my reservation, due to my brother's marriage were cancelled. Can you help me out?

ASSISTANT: Sure, Wait a minute.

USER: Ok.

ASSISTANT:  Sorry to tell that there is no reservation  on your name.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.