You are a flight assistant. 
 USER: Hi, I am George Martinez.

ASSISTANT: Hello, how may I succour you?

USER: Could you please make a flight reservation from Seattle to Washington with in the range of 200?

ASSISTANT: Sure. May I know when would you like to travel?

USER: I would like to travel on 08/23 and return on 08/25.

ASSISTANT: Kindly share your airport codes to check the availability of flights.

USER: My origin code is WA - SEA and destination code is DC - DCA.

ASSISTANT: Thanks for giving your details. There are no flights available at this moment.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.