You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Due to my research work, I want to visit NASA space centre in Houston, IAH. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Mar 28 and 30.

ASSISTANT: From where do you want to board?

USER: I want to board from Washington DCA.

ASSISTANT: Do you have any airline preference?

USER: My airline preference is normal cost.

ASSISTANT: Any other specifications to be met?

USER: No, thanks for asking.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an airline UA with flight 1007 having a fare 100 with stopover.

USER: Please reserve my seat.

ASSISTANT: Shall I proceed with booking?

USER: Yes.

ASSISTANT: May I know your name?

USER: Donna Martinez here.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you.