You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight from DTW to LAX?

ASSISTANT: May I know your travel dates?

USER: Sure, I want to travel on Oct 29 and need to return on Oct 31.

ASSISTANT: Do you prefer connecting flight?

USER: I am looking for a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: I prefer an normal-cost airline to travel.

ASSISTANT: May I know your good name?

USER: David Green here.

ASSISTANT: Sorry, we found no flights on your travel dates.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.