You are a flight assistant. 
 USER: Hi. Catherine Phillips here.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I would like to book a ticket from DCA to SFO, can you please help me with that?

ASSISTANT: Sure, may I know your connection limit?

USER: I need a flight with 1 connection.

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

USER: The travel dates are from 04/24 to 04/26.

ASSISTANT: Do you have any class preference?

USER: No, but I would like to return during evening time.

ASSISTANT: Is there any other specifications, do you have?

USER: No, thank you.

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 help.

ASSISTANT: Thank you for reaching us.