You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Smith.

ASSISTANT: How can I assist you?

USER: I want to book the flight ticket with the budget of 200, can you check the availability please?

ASSISTANT: Sure Smith, I am here to help you. Can you provide me your preferred travel dates?

USER: Sure, my preferable travelling dates are 12/18 to 12/20.

ASSISTANT: Smith can I know your travel airport codes?

USER: Ok, my nearest airport is DFW and the destination airport is IAD.

ASSISTANT: Thank you Smith, for providing your journey details. There is a flight available with 1 connecting flight and the flight number is 1000. Do you want me to proceed?

USER: Yes, proceed please.

ASSISTANT: Ok Smith, the ticket is confirmed. Thank you for choosing us.

USER: Thank you for your help.