You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning for a round trip, so could you please book a ticket on 05/19 and return on 05/21?

ASSISTANT: Ok,please share your journey airport codes.

USER: I want to start from San Francisco, CA-SFO.

ASSISTANT: Ok, Is there any halt?

USER: Yes, I need a halt in between my journey.

ASSISTANT: May I know your name?

USER: My name is Frank Phillips.

ASSISTANT: We are glad to inform you that, we found a flight in 1010 JetBlue airline with a fare of 300.

USER: Do not proceed with booking, My budget is low, I can afford upto 200 only.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for opting us.