You are a flight assistant. 
 USER: Hello, I am Michael Miller.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to attend conference meeting at Charlotte, CLT. So can you please help me in booking from DCA?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: May I know your journey dates please?

USER: My travelling dates are from Jun 12 to Jun 14.

ASSISTANT: In which class, you prefer to go?

USER: I am comfortable with any class.

ASSISTANT: Thanks for your details, please wait.

USER: Sure,.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: That's ok, not a problem. Thanks for your response.

ASSISTANT: Thank you for choosing us.