You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am Benjamin Anderson want to book a flight ticket from Seattle to Phoenix, can you book me  a direct flight?

ASSISTANT: Sure. May I know your airport codes?

USER: Yes, my airport codes are WA-SEA and AZ-PHX.

ASSISTANT: Can you share your journey dates?

USER: My travelling dates are 10/11 and 10/13.

ASSISTANT: Do you have any other specifications?

USER: I need a ticket with price under 5000.

ASSISTANT: Thanks for your details, no flights found with your details.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for opting us.