You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Robert Thomas.

ASSISTANT: How may I help you?

USER: I want to book a flight ticket to Detroit, DTW to attend seminar. Can you help me in booking a flight ticket under the range of 200?

ASSISTANT: Ok. Please provide your travelling dates.

USER: My travelling dates are from 04/23 to 04/25.

ASSISTANT: Please specify departure airport code.

USER: I am boarding at Atlanta, ATL.

ASSISTANT: Flight ticket is available for price 200 with airline Southwest.

USER: Ok, you can proceed.

ASSISTANT: Flight connections is 1 having number 1029.

USER: Ok.

ASSISTANT: Your ticket is booked.

USER: Thanks for your help.

ASSISTANT: Thanks.