You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Smith.

ASSISTANT: How can I be of your service?

USER: I am planning to meet my colleague in Detroit , could you help me in booking a flight ticket within a price limit of 200.

ASSISTANT: Sure, Can I now your travelling dates of journey?

USER: My travelling dates are 01/01 and return on 01/03.

ASSISTANT:  Ok, What are your boarding and landing points?

USER: My airport codes are SFO and DTW.

ASSISTANT: We have Southwest airline, with fare- 200, connections- 1 available for your journey.

USER: You can proceed with booking.

ASSISTANT: Your ticket is confirmed with flight 1001.

USER: Thank you.

ASSISTANT: Thanks for choosing us, have a safe journey.