You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Myself Donald Baker. I have to attend a wedding party  New York, can you please check is there any flight available to LGA on 04/17?

ASSISTANT: Sure, would you like to book a return ticket also?

USER: Yes, please book return ticket also on 04/19.

ASSISTANT: My I know the origin airport code?

USER: My origin airport code is SEA.

ASSISTANT: Sorry, there are no flights available according to your details.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you, have a great day.