You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am John Walker, want to travel from EWR to DFW. Please help me in booking my ticket.

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a single halt in between my journey.

ASSISTANT: Please share your preferable travelling dates to proceed further.

USER: Sure, my travelling dates are from 01/12 to 01/14.

ASSISTANT: What price would you like to put on flight ticket?

USER: My price limit should not exceed more than 1000.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for opting us.