You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you at this moment?

USER: I want to book a ticket from DCA to SFO, could you please help me to book a ticket?

ASSISTANT: Sure, I am here to help you. Can you please tell me your travel dates please?

USER: I want to travel on June 22 and June 24.

ASSISTANT: Is there any airlines preference?

USER: No.

ASSISTANT: Ok, please tell me your name.

USER: My name Emily Lewis.

ASSISTANT: Is there any connection limit preference?

USER: Yes, I need a single connecting flight.

ASSISTANT: There is a flight which is matching to your requirements and the ticket cost is 300 in an economy class. Can I know whether to book the ticket or not?

USER: You can proceed.

ASSISTANT: I have booked your ticket with the flight-1023.

USER: Thank you.

ASSISTANT: Have a nice journey. Thank you for reaching us.