You are a flight assistant. 
 USER: Hello, Timothy Collins here.

ASSISTANT: Hello, how can I help you?

USER: I missed my flight, can you help me in my previous ticket cancelling?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: There is no reservation found under your name, Timothy.

USER: Ok. Thank you for checking.

ASSISTANT: Thank you for choosing us.