You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Angela Williams. I need to cancel my reservation as my leaves got cancelled by my boss, so please help me with that.

ASSISTANT: Sure, please allow me a moment.

USER: Thank you, I will wait for your response.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: I will check my mail once again and let you know about my reservation status. Anyway, thank you for your valuable time.

ASSISTANT: You are welcome, have a great day.