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

ASSISTANT: Hello, how may I be of your service?

USER: Can you help me to book a flight ticket with in the fare limit 500 to attend my sister's engagement?

ASSISTANT: Sure, do you need a halt within your journey?

USER: I am happy with any kind of flight.

ASSISTANT: Could you please mention your planned dates of travel?

USER: I will depart on 08/14 and I intend to return on 08/16.

ASSISTANT: May I know your journey airport codes?

USER: My airport codes are from Seattle, WA-SEA to Detroit, MI-DTW.

ASSISTANT: Thank you for sharing your details.

USER: Ok.

ASSISTANT: We found a UA airline with flight number 1021 and price is 100 matching with your requirements.

USER: That's fine, please book my ticket.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your assistance.

ASSISTANT: Thank you for contacting us.