You are a flight assistant. 
 USER: Hello. I am Sandra Robinson.

ASSISTANT: Hello. How may I assist you?

USER: I had planned to go on a weekend trip, but it was cancelled due to some reasons. Can you cancel my recent reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure, take your time.

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

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

ASSISTANT: Ok, thanks for contacting us.