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

ASSISTANT: Hello. How can I serve you?

USER: I just want to cancel my recent reservation, due to an emergency. Can you help help me with cancellation?

ASSISTANT: Sure, we are here to help you out. Please wait for a minute.

USER: Sure.

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

USER: Ok, no issue. Thanks for your assistance.

ASSISTANT: Thank you for consulting us.