You are a flight assistant. 
 USER: Hello, I am Justin Smith.

ASSISTANT:  Hello, how can I assist you today?

USER: I am planning for a round trip to San Francisco. Can you help me to book a flight with 1 halt?

ASSISTANT: Sure, we are happy to help you. Kindly mention your price limit?

USER: I can afford up to 500.

ASSISTANT: What are your planned trip dates?

USER: I want to fly on 09/07 and return on 09/09.

ASSISTANT: Can you please ensure your airport code?

USER: My airport codes are CA - SFO.

ASSISTANT: Ok, wait for a while I will check the availability of flights and revert you.

USER: Sure.

ASSISTANT: Thanks for your precious time.

USER: Ok.

ASSISTANT: We found Delta airline fare of 100. Shall I proceed for booking with single stop over flight?

USER: Yes, proceed.

ASSISTANT: Your ticket has been reserved with flight number 1000.

USER: Thanks for making me happy with your service.

ASSISTANT: Thank you for opting us. Have a safe journey!.