You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is John Clark.

ASSISTANT: How can I assist you today?

USER: I would like to buy a house in Detroit. Can you help me in booking a ticket from IAD to DTW?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My planned trip dates are 05/07 and 05/09.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight with price 800 and the connections 0 is available. Shall I confirm your ticket?

USER: Can you please check for a ticket with price less than 500?

ASSISTANT: There is no flights available under your budget.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Welcome, have a great day.