You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Helen Mitchell. I have to attend a food festival at Detroit, please book a flight ticket with a connection.

ASSISTANT: Sure, can I know travelling dates?

USER: My travelling dates are 1st and 3rd dec.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: I want to fly from IAD to DTW.

ASSISTANT: We found a flight from UA airline with 1 connection and the fare is 200 with an economy class.Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket is booked with 1004 flight number.

USER: Thanks for the reservation.

ASSISTANT: Thank you for reaching us.