You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to attend music concert at CLT, can you please help me with booking a flight ticket from SFO?

ASSISTANT: Sure, please share me your travel dates.

USER: I would like to take off on Apr 19 and return on Apr 21.

ASSISTANT:  Can I know your good name please?

USER: My name is Brandon Brown.

ASSISTANT:  Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any other specifications?

USER: I would like to return during afternoon time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues, thank you for the information.

ASSISTANT: Thank you for opting us.

USER: You are welcome.