You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jessica Miller here.

ASSISTANT: How can I assist you at this moment?

USER: I am a social activist, I have to host a campaign to raise funds for underprivileged kids. Could you book my flight ticket?

ASSISTANT: Sure, I will help you with this. Could you please provide your journey dates?

USER: My itinerary dates are 06/07 and 06/09.

ASSISTANT: May I know your nearest airport codes of journey please?

USER: My genesis and terminus airport codes are DCA and OAK.

ASSISTANT: Delta airlines is available with connecting flight and ticket costs 100, shall I book your ticket?

USER: Please book my ticket.

ASSISTANT: Jessica Miller, your ticket is booked in flight number 1004.

USER: Thank you for your service.

ASSISTANT: Thank you and have a safe journey.