You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Stephanie Rodriguez, can you help me to book a flight?

ASSISTANT: Sure, could you please provide the codes of airport on which route you would like to have this booking?

USER: My airport codes are EWR and LAS.

ASSISTANT: Ok, what dates you are willing to travel?

USER: I am planning to fly on 03/21 and 03/23.

ASSISTANT: Noted, may I know your price limit to proceed your booking process?

USER: My price limit to this trip is 500.

ASSISTANT: Sorry to say, I did not find any flight with your provided requirements.

USER: Not an issue. Thank you for your time.

ASSISTANT: Thank you for choosing us. Have a pleasant day.