You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Janet Lopez. I want to travel on these days that is on 06/15 and back on 06/17. Can you find a flight ticket for me?

ASSISTANT: Sure, can you please let me know the airport codes that you have planned your trip to move?

USER: Sure, my source codes is OAK and the destination is SEA.

ASSISTANT: Thank you for your information, there are no flights that are moving on your journey dates to book a flight ticket for you.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.