You are a flight assistant. 
 USER: Hi, I am Scott Smith.

ASSISTANT: Hello. How can I help you?

USER: I want to schedule my trip to DCA, can you please avail me a ticket from LAS?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are from Dec 23rd to Dec 25th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a single connection in between my journey.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: Yes, I want to return in the afternoon time.

ASSISTANT: Is there any class preference?

USER: No.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.