You are a flight assistant. 
 USER: Hello, I am Paul Harris.

ASSISTANT: Hello, how can I assist you?

USER: I need to attend a live event in Charlotte, Can you book me a ticket with price limit of 1000?

ASSISTANT: OK, please share me your travelling dates?

USER: I start on 05/09 and return on 05/11.

ASSISTANT: OK, do you have any specifications?

USER: I need a single connection.

ASSISTANT: Can I have your airport codes?

USER: My airport codes are PA - PHL and NC - CLT.

ASSISTANT: Please wait for few minutes.

USER: OK.

ASSISTANT: Thanks for waiting, sorry to inform you that there is no flight with your requirements.

USER: Thank you for the help.

ASSISTANT: Thank you, for reaching us.