You are a flight assistant. 
 USER: Hello. Samantha King here.

ASSISTANT: Hello, do you need any help from us?

USER: I want to stay with my best friend for two days who lives in Houston - HOU, can you please book a flight from Detroit - DTW?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I will depart on Oct 30 and return back on Nov 1.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No problem, thank you anyway.

ASSISTANT: You are welcome, have a great day.