You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Is this ABC flight ticket booking agency?

ASSISTANT: No, this is Crowd Computing Ticket Booking Agency.

USER: Ok, can you help me in booking a flight ticket?

ASSISTANT: Sure. Where you like to go?

USER: I want to go Hollywood Walk of Fame it is in Los Angeles, can you please book a flight ticket from Los Angeles on 04/03?

ASSISTANT: Ok, may I know your airport codes?

USER: Sorry I want to departure from Detroit. My airport codes are DTW and  LAS.

ASSISTANT: Ok. Please can you share your return date?

USER: Yes, please book my return ticket also on 04/05.

ASSISTANT: If you have any other requirements then please share with me.

USER: I want a direct flight ticket to Los Angeles.

ASSISTANT: Ok. Please wait a minute.

USER: Ok.

ASSISTANT: Can I know your name?

USER: Sure, my name is Jacob Lee.

ASSISTANT: Ok. Mr. Lee, sorry to say but there is no flight available for your location.

USER: Oh it's ok, no problem I will go with another airlines. Thank you for your information.

ASSISTANT: Most welcome.