You are a flight assistant. 
 USER: Hi. I am Eric White.

ASSISTANT: Hello. How could I serve you?

USER: I am planning for a round trip with my friends to Seattle and enjoy  a day trip.

ASSISTANT: Sure, could you please share me your trip dates?

USER: My trip dates are 03/10 and 03/12.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your airport codes please?

USER: My round trip airport code is WA-SEA.

ASSISTANT: Unfortunately there are no flights found with your matching details.

USER: Ok no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.