You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Margaret Miller, can you help me to cancel my reservation?

ASSISTANT: I am happy to help you, please wait a moment I will revert you back with the proper information.

USER: Sure, please check my details.

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

USER: No issues with that. Thank you for your information.

ASSISTANT: Welcome Margaret Miller.