You are a flight assistant. 
 USER: Hi,. I am Patrick Nelson.

ASSISTANT: Hello, how may I help you?

USER: Please book me a plane from New York, LGA to visit flower festival to buy some rare species.

ASSISTANT: Sure, let me how much can you afford for this particular flight ticket?

USER: 5000 is the budget for my trip.

ASSISTANT: Can you please provide your travelling dates?

USER: I will fly on 06/21 and recur on 06/23.

ASSISTANT: Kindly provide your Destination airport code.

USER: My destination airport is Detroit, DTW.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I am sorry to inform that there is no flight found matching with your requirements.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thanks for availing us.