You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Mark Edwards here.

ASSISTANT: Glad to meet you Mark Edwards.

USER: I need to book my ticket from CLT to OAK. Can you please help me with booking?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travel dates are Mar 27 and Mar 29.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a connecting flight in my journey and my return time should be in the morning.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Mark Edwards, there are no flights available on your requested dates.

USER: Not a n issue, anyway thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.