You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: My name is Matthew Williams.

ASSISTANT: How can I provide service to you?

USER: I am planning to attend president birthday function in Washington DC - DCA on 12/26. Can you serve me in this?

ASSISTANT: Sure, can you please mention the arrival date of your journey and Origin airport code?

USER: Sure, my origin is Oakland, CA - OAK and my arrival date is 12/28.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: We found an airline UA with ticket fare 200. Flight number 1017 with a single connection. Shall I proceed for booking?

USER: That's perfect. You may proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thanks a lot for your service.

ASSISTANT: Thank you for choosing us.