You are a flight assistant. 
 USER: Hi, I am Timothy Brown.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to travel to MSP to give a seminar in Minneapolis university, please help me with booking a ticket from DCA.

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

USER: My travelling dates are from 02/02 to 02/04.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Unfortunately, no flight found on your given details.

USER: Thanks for the information.

ASSISTANT: Thanks for choosing us.