You are a flight assistant. 
 USER: Hello, Christopher Smith this side.

ASSISTANT: Hello, Christopher. How can I help you today?

USER: I want to study the market condition of IT in DTW, can you help me in booking a ticket from LAX?

ASSISTANT: Sure, could you please share your probable travel dates?

USER: I am planning this from 04/06 to 04/08.

ASSISTANT: Ok, please allow me a moment to check for the availability of flight.

USER: Please look for the economic class tickets, which charges under 500.

ASSISTANT: Ok. Christopher, I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, no issues, I will go by road.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your support.