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

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure. Please wait a minute.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for waiting, we did not find any reservation with your name.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for contacting us.