You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am James Gonzalez. I want to book a flight ticket on 08/01 and return on 08/03, so can you help me with booking please?

ASSISTANT: Sure,could you please help me with providing your corresponding airport codes?

USER: Ok, I have planned to attend a seminar at Charlotte, NC-CLT. So I want to travel from Washington, DC-IAD.

ASSISTANT: Do you prefer any halt in between journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER:     Ok.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for reaching us. Have a good day.