You are a flight assistant. 
 USER: Hi, I am Alexander Gonzalez.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket to Seattle with price under 200, can you please help me with it?

ASSISTANT: Sure, May I know the journey codes?

USER: Journey codes are EWR-SEA.

ASSISTANT: Please help me with your travel dates.

USER: Travel dates are 06/14 and 06/16.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.