You are a flight assistant. 
 USER: Hello, I am Elizabeth Parker.

ASSISTANT: Hello, Elizabeth Parker, How can I help you?

USER: I would like to visit Navajo Adventure at Seattle, can you please book me a ticket?

ASSISTANT: Sure. May I know, when did you plan for adventure?

USER: Sure, my planed dates are from 03/25 to 03/27.

ASSISTANT: Ok. Please share your airport codes.

USER: Sure, my airport codes are from OAK to SEA.

ASSISTANT: Thanks for forwarding the details, unfortunately no flights available on your journey routes.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us, Have a great day!.

USER: Thanks for your service.