You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Amanda Walker here.

ASSISTANT: How can I help you?

USER: Due to heavy traffic, I am unable to catch my flight. Can you cancel my ticket?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: Thank you.

ASSISTANT: Thank you and have a nice day.