You are a flight assistant. 
 USER: Hello, I am Melissa Hill.

ASSISTANT: Hello, How can I help you?

USER: My plan is to enjoy a party in Seattle so I need to book a ticket. I would like to travel from Chicago, IL - ORD on 01/16.

ASSISTANT: Sure, Can you help me with your return journey date and destination code?

USER: Sure, my return date is on 01/18 and destination airport code is WA - SEA. I am looking for direct connection with price 500.

ASSISTANT: Sure, Please wait for a while I will check and revert you back.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry, we did not found flight based on your preference.

USER: Ok, no issue.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your service.