You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anthony Jackson here.

ASSISTANT: In which way I can assist you Anthony today?

USER: I need your help in booking of flight ticket between Detroit and Los Angles, so can you please help me out with booking of a flight ticket between those locations?

ASSISTANT: Certainly, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can you please let me know your itinerary dates?

USER: I am planning to go on 01/04 and I need your help in booking of a return ticket also. I would like to book my return ticket on 01/06.

ASSISTANT: Sure, may I know your preferable airport code names?

USER: There are several airports near me, but I will choose DTW and LAX as my origin and destination airport codes because the airports containing best infrastructure.

ASSISTANT: Thanks for your information, please wait a moment, I will check is there any flight available or not as per your requested dates.

USER: Sure, but please get a best flight for me.

ASSISTANT: Sure. Sorry for the inconvenience, no flights available in this route as per your requested dates.

USER: Oh! So sad to heat that. Anyway, I will choose another alternative to complete my journey.

ASSISTANT: Thank you for contacting us, have a nice day Anthony Jackson.

USER: Thank you for your valuable information.

ASSISTANT: Welcome.