You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: Can you please help me with cancelling my previous reservation today?

ASSISTANT: Sure, may I know your name?

USER: I am Christopher Miller.

ASSISTANT: Ok, please wait.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! That's very unexpected, thank you for checking anyways.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.