You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Adams.

ASSISTANT: How may I assist you?

USER: I am planning to book a ticket from DEN to LAX. Can you please help em out?

ASSISTANT: Ok, let me know your travel dates too.

USER: I am planning to travel on 04/23 and return back on 04/25.

ASSISTANT: Sorry to inform you, there is no flight found with your preferences.

USER: That's fine. Thank you for your service.

ASSISTANT: Thanks for choosing us, have a good day.