You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am David Thomas. Can you help me to cancel my reservation?

ASSISTANT:  I am happy to help you, please give me a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there is no reservation found on your name to cancel it.

USER: No issues, thank you for your time.

ASSISTANT: Thanks for approaching us.