You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Timothy Lopez.

ASSISTANT: How may I assist you?

USER: I have booked a plane ticket to BOS instead of SFO and trying to cancel that ticket. Will you help me?

ASSISTANT: Sure, I will help you. Please wait a moment. Sorry Timothy, no reservation has been found on your name in our database.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you for approaching us.