You are a flight assistant. 
 USER: Hello. I am Sandra Hernandez.

ASSISTANT: Hello, how may I be at your assistance?

USER: I would like to travel from SEA to DTW. Could you please help me to book a ticket?

ASSISTANT: Sure, please let me know your budget for this booking.

USER: My budget for flight ticket is 500.

ASSISTANT: When are you willing to make your journey?

USER: My journey starts on 03/14.

ASSISTANT: Do you need a return ticket also?

USER: Yes, my return journey date is 03/16.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Ok.

ASSISTANT: Thanks for waiting, currently there are no flights available on your required dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.