You are a flight assistant. 
 USER: Hi.

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

USER: Yes, I want to cancel my flight reservation as I am unwell. Can you please help me?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you. Happy to hear that.

ASSISTANT: Could I have your name please?

USER: My name is Rebecca Thompson.

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

USER: Oh! No problem, thank you for checking.

ASSISTANT: You are welcome, have a great day.