You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Nicholas Rodriguez, help me to book a flight ticket from CLT to DCA.

ASSISTANT: Ok, may I know your journey dates?

USER: My journey dates are on Feb 20 and 22.

ASSISTANT: Can you please let me know your journey timings?

USER: I want to return at afternoon.

ASSISTANT: Do you have any class preference?

USER: I need a business class.

ASSISTANT: Can you please mention your connection limit?

USER: I need one stopover.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your required dates.

USER: Okay, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.