You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight ticket from CLT to SFO, please help me with this?

ASSISTANT: Sure, I can help you with that. May I know the dates on which you prefer to depart and arrive?

USER: My depart is on Mar 28 and arrival on Mar 30.

ASSISTANT: Do you need stopover in between your journey?

USER: I need a stopover in between my journey.

ASSISTANT: Please let me know if you have any other specifications.

USER: No.

ASSISTANT: May I know your good name please?

USER: Melissa Hernandez.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.