You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How exactly I can serve you the best today?

USER: Can you book a flight ticket to Oakland, OAK by the name William King?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, share your starting journey date.

USER: I want to start my journey on 01/15.

ASSISTANT: May I know your origin airport code?

USER: I am boarding at Philadelphia, PHL.

ASSISTANT: Kindly, mention your fare limit.

USER: I can pay up to 200.

ASSISTANT: Please, share your return date.

USER: I will be return on 01/17.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Sure.

ASSISTANT: We are sorry to inform you that, currently no flights are running on your journey routes.

USER: Ok, No issues. Thank you.

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