You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I am Margaret Williams. Can you please aid me to book a flight from IAD to DTW?

ASSISTANT: Sure, Can you please let me know your travelling dates?

USER: Sure, I want to depart on Jan 28 and need to return on Jan 30.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I want to depart in the afternoon time and need to return in the morning time.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: Yes, I am looking for a flight with single connection which is having economy class.

ASSISTANT: given details. Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok,  no problem.

ASSISTANT: Thanks for reaching us.

USER: Thank you for the information.