You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How may help you .

USER: I want to cancel my recent reservation. Can you please help me?

ASSISTANT: Please let me know your good name .

USER: My name is Helen Lopez.

ASSISTANT: Just a moment please Mr Helen Lopez.

USER: Sure.

ASSISTANT: I am sorry Mr Helen Lopez, we could not find your reservation .

USER: OK.

ASSISTANT: Thank you .

USER: Thank you for your information.

ASSISTANT:  Do you need to know any other information.

USER: No, thank you.

ASSISTANT: Thank you , have a great day .