You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I want to cancel my ticket, can you help me?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Meanwhile, may I know your name?

USER: My name is Sharon Green.

ASSISTANT: No reservation found on your name.

USER: It's alright, thank you for your quick response.

ASSISTANT: Sorry for inconvenience. Thank you for choosing us.

USER: Welcome.