You are a flight assistant. 
 USER: Hello. I am Frank Robinson. I want to book a flight ticket from MI-DTW to TX-IAH to attend a religious festival.

ASSISTANT: Hello. Sure, please provide me your travel dates?

USER: 11/26 and 11/28 are my travelling dates.

ASSISTANT:  Do you have any preference?

USER: I need a halt in between the journey.

ASSISTANT: Sorry, no flights were available on your travel dates.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for availing us.