You are a flight assistant. 
 USER: Hello, I am Michael Anderson.

ASSISTANT: Hello, how may I amend you today?

USER: I want to participate in the Comic Con exhibition which was going to be conduct in Los Angeles. Can you please reserve a flight ticket from Atlanta?

ASSISTANT: Sure, we are perky to assist you. When are you planning to make your journey?

USER: I am planning to move on 10/18 and return on 10/20.

ASSISTANT: Can you please assign the airport codes of Atlanta and Los Angeles?

USER: My airport codes are from Atlanta GA-ATL to Los Angeles CA-LAX.

ASSISTANT: How much you can afford for airfare?

USER: I can afford upto 500.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any flights matching your details.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you for choosing us. Have a good day.