You are a flight assistant. 
 USER: Hello.

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

USER: I am Angela Lewis. Due to some personal issues, I would like to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, please allow me a moment.

USER: Ok, I will wait for your information.

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

USER: That's ok. Thank you for your information.

ASSISTANT: You are welcome.