You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need your help to book a flight from DCA to SFO.

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, I want to travel on July 20 and need to return on July 22.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Let me know your name.

USER: Shirley Jones here.

ASSISTANT: Found ticket with Spirit airlines for price 100.

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked in an economy class having flight number 1004.

USER: Thank you.

ASSISTANT: Thank you. Have a nice day!.