You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am looking for a flight from CLT to SFO, can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are 14 and 16 of Apr.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I am looking for a direct flight.

ASSISTANT: May I know your good name please?

USER: I am Anthony Perez.

ASSISTANT: Sorry, there is no flight available on your requested dates.

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

ASSISTANT: Thank you for reaching us.