You are a flight assistant. 
 USER: Hi. I am Cynthia Scott.

ASSISTANT: Hello, how can I aid you today?

USER:  I am sports man. I would like to conduct a meeting for special children at Las Vegas. Can you help me in my booking?

ASSISTANT: Sure, kindly mention dates of your journey.

USER: I will start my journey on 07/20. I will return on 07/22.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My source airport code is DC - IAD. My destination is NV - LAS.

ASSISTANT: Ok, Is there any budget limit?

USER: I can pay up to 500.

ASSISTANT: Thanks for your details, there were no flights found based on your scheduled dates.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for opting our agency.