You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Clark.

ASSISTANT: How may I be of your helping hand?

USER: Me and my friend planned to attend the demo class at Boston BOS about how to face an interview. Could you please help me in booking a ticket from Detroit DTW?

ASSISTANT: Sure, I will assist you.

USER: Thank you.

ASSISTANT: How much can you afford for a ticket fare?

USER: I can pay up to 200, so please book me a cheapest flight.

ASSISTANT: May I know on which dates you would like to travel?

USER: We have a appointment on 08/29, so please help me in booking a ticket on 08/28 and return ticket on 08/30.

ASSISTANT: Thank you for your details, there is a flight in an airline Hawaiian of number 1000 with a price of 200 having a single connection. Shall I reserve?

USER: You can reserve a ticket in this airline.

ASSISTANT: Your flight ticket is confirmed.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us. Have a nice day.