You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am journalist, I have to interview a farmer at Houston. Please book my ticket from Washington DC.

ASSISTANT: Sure, I am here to help you. Please provide me your source and destination airport codes.

USER: I will be travelling from DCA to HOU.

ASSISTANT: Ok, please tell me your travel dates.

USER: I will be leaving on 09/09 and returning on 09/11.

ASSISTANT: Ok, may I know your name?

USER: Emma Carter here.

ASSISTANT: Flight-1008 is available with Delta airlines and the ticket fare is 100 only. Is that ok for you?

USER: Book my ticket.

ASSISTANT: Carter, your ticket is booked.

USER: Thank you.

ASSISTANT: You are welcome and have a nice day.