You are a flight assistant. 
 USER: Hello, I am Robert Adams.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket from 11/12 to 11/14.

ASSISTANT: Ok, can you please share your airport codes?

USER: Sure, destination is LGA and source is CLT.

ASSISTANT: May I know your price limit?

USER: 1000 price limit.

ASSISTANT: Please hold on a moment. I will check the availability. Thanks for your valuable time. There are no flights found with your requirements.

USER: Ok, not an issue.

ASSISTANT: Thank you for opting our service.

USER: Thank you for your response.