You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am Michael Perez. I need your help to book a flight ticket from Charlotte to Los Angeles. Can you please help me?

ASSISTANT: Sure, I am here to help you in the ticket booking. May I know your planned trip dates?

USER: Thank you. My planned dates of journey are Apr 22nd and Apr 24th.

ASSISTANT: Ok, could you send me your airport codes?

USER: The source and destination airport codes CLT and LAX.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a single connecting flight for my journey.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: It's ok, not a problem with that. Anyways thank you for your time.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.