You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Anderson.

ASSISTANT: Timothy, how can I assist you?

USER: I had booked a ticket recently to meet my sister, but suddenly she came to my location, so I want to cancel my ticket, can you help me?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, no problem, thank you for your help in searching.

ASSISTANT: Thank you for approaching us.