You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Could you please check the flight availability in economy class?

ASSISTANT: Sure, may I know the travelling dates?

USER: My trip dates are Oct 13 and Oct 15.

ASSISTANT: Please help me with your journey codes.

USER: I am heading to LAX from CLT.

ASSISTANT: Do you have any connection limit?

USER: I need  a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I want to return in the evening.

ASSISTANT: May I know your name?

USER: I am Justin Carter.

ASSISTANT: Sorry, no flights found with your preferable dates.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.