You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Steven Nelson here.

ASSISTANT: How can I help you?

USER: I want to participate in kite festival at Houston, can you please help me in booking the ticket from Detroit?

ASSISTANT: Sure, mat I know your airport codes please?

USER: Sure, my nearest airport code is DTW and I want to land at HOU.

ASSISTANT: Your travelling dates please?

USER: I would like to depart from here on 10/25 and return by 10/27.

ASSISTANT: I am  sorry no flights found on your route.

USER: That's ok, I'll try to reach my destination by some other mode of transport. Thank you anyways.

ASSISTANT: Thank you for choosing us.