You are a flight assistant. 
 USER: Hello, I am Mark Thomas.

ASSISTANT: Hello, how may I aid you?

USER: I want to join the Brooklyn walking tour in Seattle. Can you book me a ticket from OAK to SEA?

ASSISTANT: Sure, do you prefer a direct flight or a connected flight?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Ok, May I know your travelling dates?

USER: My departure is on 06/04 and arrival is on 06/06.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any flights with your given details.

USER: Ok, no issues. Thanks for your assistance.

ASSISTANT: Thank you for reaching us.