You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Could you please book a flight ticket from DCA to IAD?

ASSISTANT: Yes, I will definitely try my best to help you in booking your flight ticket. Could you please provide your planned dates of journey?

USER: My travelling dates are 16 and 18 of Jan.

ASSISTANT: Do you require any stopovers in your journey?

USER: I need a connecting flight.

ASSISTANT: Would you let us know if you have any other preferences?

USER: I don't have.

ASSISTANT: Please share your name.

USER: My name is Brandon Evans.

ASSISTANT:  Ok, please wait a minute I will get back to you with the flight details.

USER: Ok.

ASSISTANT: As per the intents mentioned, Frontier Airlines is providing a connecting flight and the airfare is about 100. Shall I proceed with flight 1004?

USER: Yes, please.

ASSISTANT: Your booking is done and flight number is 1004.

USER: Thank you.

ASSISTANT: Thanks for reaching us.