You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you. Can I know your name please?

USER: Donald Miller.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found for this search.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.