You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: I am Kevin White. Can you please reserve a flight ticket from Detroit MI-DTW to NV-LAS?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: May I know your connection preference?

USER: I need a connecting flight.

ASSISTANT: Kindly share your fare limit.

USER: I can spend up to 200.

ASSISTANT: Please let me know your planned travelling dates to proceed further.

USER: My travelling dates will be 09/05 to 09/07.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.