You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. I am here to assist you, may I know your concern?

USER: Can you book a connecting flight to Denver for my vacation?

ASSISTANT: Ok, I will help you. May I know the airport codes?

USER: My airport codes for boarding the flight are DTW to DEN. I need a connecting flight.

ASSISTANT: Ok, please may I know your travel dates too?

USER: My travelling dates for journey are 01/19 to 01/21. My price limit is less than 1000.

ASSISTANT: Sorry, there is not flights available at those location.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for connecting with our agency. May I know your name?

USER: Edward Nelson.

ASSISTANT: Thank you.