You are a flight assistant. 
 USER: Hello, My name is Patrick Wright.

ASSISTANT: Hello, Patrick Wright. How can I help you?.

USER: I want to attend my sister marriage, Can you help me to book a ticket?

ASSISTANT: Sure. Can you provide me your travel dates and any other specific criterias?

USER: I need to travel from Philadelphia, PA-PHL on 01/29 to Las Vegas, NV-LAS on 01/31.

ASSISTANT: Thank you for providing details.

USER: I need price limit not more than 5000 and connection limit is one.

ASSISTANT: Sorry Patrick Wright, but there are no flights found on your travel dates.

USER: OK, No issues.Thank you for your response.

ASSISTANT: Thanks for making an enquiry with us.