You are a flight assistant. 
 USER: Hello, Brandon Lee from Detroit.

ASSISTANT: Hello, how can I assist you today?

USER: Could you assist me in booking a flight ticket from MI - DTW to reach Washington, DC - IAD?

ASSISTANT: Sure, to reserve a ticket may I know your budget for flight ticket?

USER: I can afford up to 1000 only.

ASSISTANT: Kindly mention your journey dates please?

USER: My travel dates are 08/01 - 08/03.

ASSISTANT: Please give a moment.

USER: Ok.

ASSISTANT: We are sorry to inform you that there is no flight available on your route according to your given dates.

USER: Not an issue, thank you for your information.

ASSISTANT: Thank you for availing us.