You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Edwards.

ASSISTANT: How may I support you today?

USER: I would like to attend Global Environmental Conference in DTW. Can you book me a ticket from IAD?

ASSISTANT: Sure, we are gleeful to assist you in booking.

USER: Thank you.

ASSISTANT: Do you need a break in between your journey?

USER: No, I need a direct flight.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I would start on Nov 24th and return on 26th.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No, I am okay with the above essentials.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: That's Ok, thanks for you response.

ASSISTANT: Thank you for opting us.