You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I help you with?

USER: I am Frank Gonzalez.

ASSISTANT: Ok.

USER: I need a reservation to San Francisco, CA - SFO to go for Cable car museum.

ASSISTANT: Ok.

USER: Could you book a ticket to me on 04/19?

ASSISTANT: Sure. Do you want any lay by between your journey?

USER: I need a lay by in journey.

ASSISTANT: ok. When are you willing to return on?

USER: I intend to return on 04/21.

ASSISTANT: Please mention your boarding point.

USER: Washington DC - IAD is my nearest airport so, I want to board from IAD.

ASSISTANT: Ok. Please wait for a while.

USER: Sure.

ASSISTANT: UA airline, flight number 1004,is available that matches your criteria. May I proceed to book?

USER: Yes proceed with my booking.

ASSISTANT: Ok. Your booking is done.

USER: Thank you for quick service.

ASSISTANT: Thank you, for opting us.