You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: My name is Robert carter, I want to book a normal-cost airline to attend a family meeting in IAD, can you help me with booking?

ASSISTANT: Robert carter, I will help you. Please help me with your planned travel dates.

USER: Thank you. My travel dates are July 26 and July 28.

ASSISTANT: Please help me with your source airport code.

USER: My source airport code is CLT.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please help me with your depart and arrival time.

USER: My return time is afternoon.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Robert Carter, I am really sorry to inform you that there is no flight available for your journey.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great time.