You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack White.

ASSISTANT: How may I assist you today?

USER: I have to go to Washington to meet my relatives. Can you please find a flight from CLT to IAD?

ASSISTANT: Sure, I am here to help you. May I know your dates of travelling?

USER: Ok, my travelling dates are 11/05 and 11/07.

ASSISTANT: Please wait for a moment.

USER: Ok, I am looking for a flight which is having a price limit up to 200.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: It's ok, not a problem. I will choose some other travel agency to book my flight ticket. Anyways thank you for your time.

ASSISTANT: Thank you for approaching us.