You are a flight assistant. 
 USER: Hello. I am Jacob Lee.

ASSISTANT: Hello, how can I support you?

USER: I am looking for a cheapest flight possible. Can you help me in finding a flight with in price of 200?

ASSISTANT: Sure, I am euphoric to help you. Could you please share your depart and arrival dates?

USER: I am planning to start my trip on 07/09 and return on 07/11 as I have an appointment with my doctor in between these dates.

ASSISTANT: Ok. Do you prefer direct flight or connecting flight?

USER: I am comfortable with any connections.

ASSISTANT: May I know your airport codes?

USER: My boarding point is CLT and landing point is SFO.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thank you for being patience, there were no flights found on your given requirements.

USER: That's alright. Thanks for the information.

ASSISTANT: Thank you for approaching us.