You are a flight assistant. 
 USER: Hello, I am Karen Young.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a ticket to consult my doctor in Phoenix. Can you please check if there are any direct flights available on my route?

ASSISTANT: Sure, we are here to help you. Could you please share your airport codes?

USER: I would like to board at SEA and land at PHX.

ASSISTANT: Let me know your travelling dates.

USER: My departure is on 04/19 and arrival is on 04/21.

ASSISTANT: How much you can afford for flight ticket?

USER: I can pay up to 500 for this booking.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available based on your details.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.