You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Emma Smith here. I would like to book a flight reservation from DCA, can you check for the flights from MSP?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are from Mar 9th to Mar 11th. My depart time is in the afternoon.

ASSISTANT: Do you have any class preference?

USER: No, but I need 1 connection flight only.

ASSISTANT: Emma Smith, I am sorry to inform you that there is no flight available at your request.

USER: Oh! That's very sad to know. Anyways, thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: You are welcome.