You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from CLT to LAS?

ASSISTANT: Sure, I am happy to help you. When are you planning to make your journey?

USER: I would like to take off on 09 Apr and return on 11 Apr.

ASSISTANT: Do you prefer any break in between journey?

USER: I want a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer to depart in the afternoon.

ASSISTANT: May I know your good name?

USER: I am Samuel Baker.

ASSISTANT: Sorry, no flights are available on your journey dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.