You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carol Lewis here.

ASSISTANT: How can I aid you for the day?

USER: I would like to book a ticket from DEN to DTW, can you please help me with that?

ASSISTANT: Sure, I am here to help you with this. Can you please provide your journey dates?

USER: The travel dates are from 07/03 to 07/05.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt.

ASSISTANT: Do you have any other specifications?

USER: Price limit is 200.

ASSISTANT: Carol Lewis, there are no flight services available on this route on your provided dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for contacting us.