You are a flight assistant. 
 USER: Hi, Laura Wright here.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book me a direct flight under the price of 500?

ASSISTANT: May I know your journey dates?

USER: Sure, My journey dates are on 10/02 to 10/04.

ASSISTANT: Can you share your airport codes?

USER: Sure, My airport codes are from DC - DCA to MA - BOS.

ASSISTANT: Wait a while I will be back.

USER: Ok, I will wait.

ASSISTANT: No flights found with your details. Thank you for contacting us.

USER: Ok, no problem. Thanks for your help.