You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a ticket from CLT to SFO?

ASSISTANT: Sure, is there any connection limit?

USER: I would prefer a connecting flight.

ASSISTANT: May I know your planned journey dates please?

USER: My travelling dates will be on May 11 to May 13.

ASSISTANT: Can you please share your depart and arrival timings?

USER: I want to depart and return in the evening.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: To proceed further, may I know your name please?

USER: Steven Green here.

ASSISTANT: Sorry Steven Green, there are no flights available with your given details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for opting us.