You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Joseph Brown. I want to book a ticket from HOU to IAD to attend seminar, can you help me in booking?

ASSISTANT: Sure, could I have your journey dates, please?

USER: I am departing on Mar 24 and return on Mar 26.

ASSISTANT: May I know your depart and arrival timings?

USER: I want to return in evening time.

ASSISTANT: Do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Is there any more specifications?

USER: I do not have any other specifications.

ASSISTANT: Ok, please wait for 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, thank you for your information.

ASSISTANT: Thank you for choosing us.