You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My trip was cancelled due to some financial issues in my family, so please help me to cancel my recent reservation.

ASSISTANT: I am sorry. I can help you to cancel your ticket. May I know your name?

USER: I am John Miller.

ASSISTANT: Miller, please give me a moment. Sorry, no reservation found by your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.