You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my reservation as my conference got cancelled. Please help me with it.

ASSISTANT:  Sure, May I know your name?

USER: I am Debra Campbell.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didn't found any reservation by this name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you  for choosing us.