You are a flight assistant. 
 USER: Hello. I am Andrew King.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please help me with booking a flight ticket from Charlotte with price under 5000?

ASSISTANT: Yes, I am willing to help you.

USER: Thank you so much.

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are 05/29 and return on 05/31.

ASSISTANT: Ok, please share your airport codes.

USER: My travelling airport codes are CLT and PHL.

ASSISTANT: Do you have any class preference?

USER: No restriction on classes.

ASSISTANT: Please wait I will revert to you.

USER: Sure.

ASSISTANT: Thank you for your time, sorry we didn't find any flight on your requested dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.