You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER:  I am having sudden meeting in my office, can you please help me cancel my reservation?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Sure, my name is Elizabeth Johnson.

ASSISTANT: There is no reservation on your name in our database.

USER: No problem, thank you for assisting me.

ASSISTANT: Thank you for choosing us.