You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation, due to some issue. could you please help me?

ASSISTANT: May I know your name please?

USER: I am Andrew Adams.

ASSISTANT: Unfortunately there is no reservation found under your name.

USER: Ok, thank you for helping us.

ASSISTANT: Welcome, have a nice day.

USER: Thank you.