You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mark Lee.

ASSISTANT: How can I help you?

USER: I want to visit Ambassador Bridge with my kids, can you help me in booking the ticket?

ASSISTANT: Sure, please provide the journey details?

USER: It's from LAS to DTW. The dates of travel are from 11/13 to 11/15.

ASSISTANT: Sorry, there are flights found based on your requirements.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a nice day.