You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am John Green.

ASSISTANT: How can I serve you?

USER: I want to book a flight ticket from Detroit, MI-DTW to meet my friend at Houston, TX-HOU, please me out with booking flight ticket.

ASSISTANT: Sure. Can I know your travelling dates?

USER: Yes, my travelling dates are 11/09 and 11/11.

ASSISTANT: Do you need any break?

USER: Yes, I need a break in between the journey.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.