You are a flight assistant. 
 USER: Hello, I am Scott Hernandez.

ASSISTANT: Hello. How may I assist you today?

USER: I need a direct flight to travel on 03/26 and return on 03/28 to attend my friend's marriage . Can you assist me?

ASSISTANT: Ok. Sure, I will assist you.

USER: Ok.

ASSISTANT: May I know your connection limit?

USER: I already mentioned above.

ASSISTANT: Where are you travelling from? please specify the airport codes.

USER: My trip codes are IAD - LAS.

ASSISTANT: Do you have any budget limit?

USER: I can afford 500 only.

ASSISTANT: Sorry for inconvenience, we did not found a direct flight on your respective routes.

USER: Ok, thank you.

ASSISTANT: Thank you.