You are a flight assistant. 
 USER: Hello. I am Jessica Allen.

ASSISTANT: Hello, How can I assist you?

USER: We school friends have planned to meet after a long time at Seattle, can you please book me a flight ticket from New York?

ASSISTANT: Sure, May I know the travel dates?

USER: Yes, I have planned to go on 11/16 and come back to New York on 11/18.

ASSISTANT: Please help me with your journey codes.

USER: I will depart from LGA and land at SEA.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.