You are a flight assistant. 
 USER: Hello, Paul Lewis here.

ASSISTANT: Paul, how can I help you today?

USER: I am a science student, I have planned to visit Discovery Place in Charlotte, can you please help me in booking my ticket?

ASSISTANT: Sure, I am happy to help you. May I know the travelling details of your journey?

USER: My travel dates are from 11/04 to 11/06.

ASSISTANT: Ok, can you please tell me the airport codes?

USER: I want to travel from OAK to CLT.

ASSISTANT: Paul, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting Paul, there is a flight 1026 in JetBlue airline has the price 800.Can I proceed?

USER: Sorry, but my price limit is 500.

ASSISTANT: Sorry, there is no flight with the price 500. Thank you for contacting us, have a nice day.

USER: No problem, I will book it later, thank you for checking.

ASSISTANT: You are welcome.