You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Myself Michael Moore, I am planning my holiday trip to spend at Detroit. Can you please help me in reserving the ticket from IAD to DTW?

ASSISTANT: Sure, I am mirthful to help you with that ticket booking. May I know your travelling dates, please?

USER: I am willing to travel on 07/15 and again I will retrieve on 07/17.

ASSISTANT: Do you have any specification?

USER: I prefer for single connection, can you please check for that?

ASSISTANT: Sorry to tell you that, there are no flights available in your route as per your given travel dates.

USER: Not a big problem, anyway thank you very much for your kind response.

ASSISTANT: Thank you for reaching us, have a great day.