You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: Samuel Clark is my name.

ASSISTANT: How may I help you today?

USER: I am heading from New York to report my joining. Can you help me in booking a direct flight?

ASSISTANT: Sure, could you please let me know your source and destination?

USER: My travel is from EWR to CLT.

ASSISTANT: Do you have any price limit?

USER: It should not be more than 500.

ASSISTANT: Please let me know your preferable travelling dates.

USER: I will depart on 02/04 and return on 02/06.

ASSISTANT: Just a moment.

USER: Ok.

ASSISTANT: Thanks for being patient, unfortunately there are no flights found with your request.

USER: Ok, thank you for your help.

ASSISTANT: Thanks for choosing us.