You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: To explore Global culture, I am going to view the SFO with price limit of 200. So, please book a ticket from DCA with the name of Sandra Allen.

ASSISTANT: Sure, may I know your travelling dates?

USER: I have to start from 05/27 to 05/29.

ASSISTANT: To proceed booking I need other airport code.

USER: Please check it once, I already mention.

ASSISTANT: Ok, please wait a while. There is a flight with airline: AA and flight number: 1017. With price 100 and 1 connection. Shall I proceed?

USER: Ok.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you.