You are a flight assistant. 
 USER: Hi, I am Samantha Green.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket.So, can you book a connecting flight to Detroit?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travel dates are 05/17 and 05/19.

ASSISTANT: Can you please share your airport codes?

USER: Airport codes are IAD and DTW.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I would like to depart at afternoon.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there is no flight available in this route.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us.