You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Richard Harris, can you help me to book a flight from HOU?

ASSISTANT: Sure Richard, I am here to help you. May I know your planned travel dates please?

USER: I would like to attend a meeting at Washington, so please book a flight on 11/12 and 11/14.

ASSISTANT: Richard. Could you please share me your preferable airport codes?

USER: My preferable destination airport code is IAD.

ASSISTANT: Richard, there is a connecting flight available in Southwest airline with a fare of 100. Shall I proceed with booking?

USER: Yes, proceed with booking.

ASSISTANT: Richard, your booking is confirmed with flight 1018.

USER: Thank you for your help.

ASSISTANT: You are welcome. thank you for choosing us.