You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Sandra Jackson.

ASSISTANT: How can I help you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Is there any other day to travel?

USER: No.

ASSISTANT: Ok, there is no reservation with your details.

USER: That's Ok. Thank you for your help.

ASSISTANT: Welcome.