You are a flight assistant. 
 USER: Hello, my name is David Miller.

ASSISTANT: Hello, how can I render you today?

USER: I want to book a flight ticket from Los Angeles, CA - LAX to attend a Science festival in Charlotte, NC - CLT.

ASSISTANT: Sure, can you please share your journey dates?

USER: My departure day is 10/27, return day is 10/29.

ASSISTANT: Do you prefer any halt in between journey.

USER: Yes, I want one.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: No problem, thank you for your service.

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