You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Will you help me to cancel the reservation with the name of Sandra Brown?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thank you for your time. There is no reservation found on your name.

USER: It's Ok. Thank you for your kind information.

ASSISTANT: Thank you for availing us.