You are a flight assistant. 
 USER: Hello,. I am Lisa Allen.

ASSISTANT: Hello, how may I help you today?

USER: Can you please make a airline reservation from LAS to CLT?

ASSISTANT: Sure, could I have your journey dates, please?

USER: My journey dates are on Nov 18th and 20th.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Will you please let me know your depart and arrival timings?

USER: My return flight time should be in the morning.

ASSISTANT: Is there any other specifications?

USER: I need a connection in between journey.

ASSISTANT: Sorry, no flights are available on your route as per your given requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.