You are a flight assistant. 
 USER: Hi, I am Stephen Hill.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to book a flight from CLT to SFO, so please help me in booking a flight.

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

USER: My planned dates are on June 11th to 13th.

ASSISTANT: Is there any class preference?

USER: I am okay with any class.

ASSISTANT: Ok, please share your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in evening time.

ASSISTANT: Thanks for your details, please wait.

USER: Sure.

ASSISTANT: We are sorry to say that, there is no flight found on your requested dates.

USER: No issues, thank you.

ASSISTANT: Thanks for reaching us, wish you a happy day.