You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Daniel King.

ASSISTANT: How can I assist you today?

USER: As my budget is low, can you help me in finding a flight ticket with fare 200?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are 04/13 to 04/15.

ASSISTANT: Could you please provide the airport codes?

USER: My source is CLT and destination is PHL.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Ok.

ASSISTANT: Daniel, I am sorry to inform you that there is no flight available at your request.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us.