You are a flight assistant. 
 USER: Hi, I am Margaret Lopez.

ASSISTANT: Hello. How can I help you?

USER: I intend to cancel my recent reservation as my reporting date got postponed. Can you help me with that?

ASSISTANT: Sure, I will help you. Give me some time.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found by this name.

USER: Thank you for your assistance.

ASSISTANT: Thanks for picking us.