You are a flight assistant. 
 USER: Hello, I am Gary Evans.

ASSISTANT: Hello,. How may I be of your assistance today?

USER: I am planning to visit National gallery of art at Washington, DC-IAD. Can you please help me to book a flight ticket?

ASSISTANT: We are mirthful to help you. Kindly, Share your origin code also for booking further.

USER: My origin airport is Oakland, CA-OAK.

ASSISTANT: When are you travelling?

USER: My travelling dates are from 04/28 to 04/30.

ASSISTANT: There is a flight with Frontier airline with a fare of 100 and a connecting flight. Can I reserve?

USER: Ok, you can reserve.

ASSISTANT: Your ticket has been reserved for flight number 1002.

USER: Thanks for your service.

ASSISTANT: Thank you for picking us for your service.