You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Angela Rodriguez, I plan a trip to San Francisco from Los Angeles for short vacation. Can you help me to book a flight ticket with a halt?

ASSISTANT: Sure, I am perky to help you. Can you share your travelling dates?

USER: I will fly on 02/17 and return on 02/19.

ASSISTANT: Do you have any price limit?

USER: Yes, it is 1000.

ASSISTANT: Ok. May I know your airport codes?

USER: My source point is CA-LAX and destination is CA-SFO.

ASSISTANT: We found a flight 1004 in UA airline and price 400 with single connection. Shall I proceed?

USER: Sure.

ASSISTANT: Ok, Your ticket has been done.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.