You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Your good name please?

USER: I am Gary Lee.

ASSISTANT: May I know, what kind of help you required now?

USER: I want to celebrate my birthday with my parents at LAS on 12/15.

ASSISTANT: OK.

USER: Can you please help me in booking a ticket?

ASSISTANT: Sure, I can help you. Kindly mention your return date?

USER: It would be on 12/17.

ASSISTANT: From where you want to start your journey?

USER: I want to start from SFO.

ASSISTANT: May I know your price limit?

USER: It should not exceed 5000.

ASSISTANT: OK. We found a direct flight in Southwest airline. Is it ok for you?

USER: No, I need one connection. Please do not proceed.

ASSISTANT: Ok, thanks for reaching us.

USER: Thanks for your service.

ASSISTANT: Hope to serve you better next time.