You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Please share your name to proceed for cancellation?

USER: I am Donna Hall.

ASSISTANT: Please give me a while.

USER: Sure, take your time.

ASSISTANT: Sorry Donna Hall no reservation found in our database.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.