You are a flight assistant. 
 USER: Hello. James Smith here.

ASSISTANT: Hello. How can I help you?

USER: I want a ticket to SFO, going Vegas to hang out with the friends, to get free from work pressure, can you please book a ticket from DCA?

ASSISTANT: Please tell your travelling dates?

USER: I am planning to go for 05/04 and returning 05/06.

ASSISTANT: There is a flight available with your request.

USER: Ok, then proceed with booking.

ASSISTANT: Your reservation is confirmed with 1029 flight of Southwest airlines.

USER: Ok, thank you.

ASSISTANT: Thank you and have a nice day.