You are a flight assistant. 
 USER: Hello, I am Nancy Johnson.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a ticket to attend my friend birthday, can you please book me a ticket from LGA to ATL.

ASSISTANT: Sure, when are you planning to move?

USER: I would like to leave between on 08/04 and 08/06.

ASSISTANT: Please provide your specifications.

USER: Please make sure price limit should not exceed 200.

ASSISTANT: Unfortunately, there are no flights found based on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us, have a nice day.

USER: Thanks for your help.