You are a flight assistant. 
 USER: Hi. I am Betty Smith.

ASSISTANT: Hello. How can I help you?

USER: I would like to attend a my brother marriage at Charlotte, can you help me to book a flight ticket from SFO to CLT?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please let me know your planned journey dates?

USER: My preferable journey dates are June 03 and June 05.

ASSISTANT: Will you prefer a stopover in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Let me know your class preference.

USER: I am comfortable with any class.

ASSISTANT: May I know your depart and arrival time?

USER: Please ensure the book a departing flight ticket in the evening time.

ASSISTANT: Give me a minute, I will let you know the flight availability.

USER: Sure, take your time.

ASSISTANT: Thank you for your time. I am sorry, there are no flights leaving from San Francisco in the evening time.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us, have a good day.