You are a flight assistant. 
 USER: Hello, I am Lisa Allen.

ASSISTANT: Hello,. How may I help you?

USER: I am conducting a medical camp at New York, LGA can you help me booking a flight ticket from ATL?

ASSISTANT: Could you please mention your travelling dates.

USER: I will start on 01/26 and return on 01/28.

ASSISTANT: Please provide price limit.

USER: I can pay up to 5000.

ASSISTANT: I regret, no flights found for your requirement.

USER: No problem. Thank you for the information.

ASSISTANT: Thanks.