You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please help me to book a flight ticket from IAD to MSP.

ASSISTANT: May I know your travelling dates please?

USER: My trip is in Sept from 20th to 22nd.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: There is a flight with single connection in Frontier airlines, can I proceed for booking in 1010 flight?

USER: Yes, proceed.

ASSISTANT: On which name can I proceed for booking?

USER: Justin Edwards.

ASSISTANT: Your booking is done in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.