You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Rebecca Parker, I plan to visit Austin from Washington DC for vacation. Can you find a flight under fare of 500?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: I will travel on 06/07 and return on 06/09.

ASSISTANT: Please provide your airport codes?

USER: I like to fly from airport IAD and land on airport AUS.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We have not found any flights with your given details.

USER: Ok, thanks you for your service.

ASSISTANT: Thanks for choosing us.