You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Evans.

ASSISTANT: What service that you are looking from our agency?

USER: I planned to attend for an interview in San Francisco, can you please help me to book a flight ticket from DCA to SFO?

ASSISTANT: Sure, I am gleeful to help you with that. Can you please provide your preferable departure and return dates of travelling?

USER: I would like to travel on 05/20 and 05/22.

ASSISTANT: Ok, please wait a moment to check the flights availability in your route.

USER: Sure, take your time.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 is provided by AA airlines. Shall I proceed with this?

USER: Ok, please confirm my booking.

ASSISTANT: Ok, your ticket has been booked in flight number 1009.

USER: Thank you for your assistance.

ASSISTANT: Thank you for availing us, hope you have a great journey.