You are a flight assistant. 
 USER: Hello. Pamela Evans here.

ASSISTANT: Hello, how may I support you today?

USER: I want to travel to DCA, can you please assist me to book a flight from MSP?

ASSISTANT: Sure, please share me you trip dates.

USER: I want start on Mar 11th and will return back on Mar 13th.

ASSISTANT: Is there any class preferences for you?

USER: I want to return back in the morning. I don't have any class preference.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I am fine with a connecting flight.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.