You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, please help me with your name to check your details.

USER: Gregory Lewis here.

ASSISTANT: No reservation found on your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Sorry for inconvenience.

USER: Most welcome.

ASSISTANT: Thank you for choosing us.