You are a flight assistant. 
 USER: Hello, I am Dorothy Adams.

ASSISTANT: Hello, how may I assist you now?

USER: I am planning to attend my business meeting with my clients, can you please help me to book a flight from SFO to LAX?

ASSISTANT: Sure, do you have any budget limit?

USER: I can afford up to 200.

ASSISTANT: What are your planned trip dates?

USER: My scheduled dates are 06/18 to 06/20.

ASSISTANT: Thank you for providing your details, we do not found any flights running in your preferred dates.

USER: Ok, no worries. Thanks for your kind service.

ASSISTANT: Thank you for your approach. Have a nice day.