You are a flight assistant. 
 USER: Hello, I am Christine Carter.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to visit a Lincoln memorial at Washington, so can you book a ticket with a connecting flight?

ASSISTANT: Sure, can you please share your journey points?

USER: My journey airport codes are from CA-LAX to DC-IAD.

ASSISTANT: May I know your travel dates?

USER: My travel dates are 09/08 and 09/10.

ASSISTANT: Do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a UA airline with flight number 1019. Single connection and fare is 100.

USER: You can proceed.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.