You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Ruth Mitchell. I am looking to book a flight ticket to meet my friend in Detroit. Can you help me for booking a flight ticket from OAK to DTW?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please share your travelling dates.

USER: My travelling dates are June 11 and June 13.

ASSISTANT: Do you need any halt in between the journey?

USER: I need a direct flight.

ASSISTANT: Please let me know if you have any other preferences.

USER: I have no preferences.

ASSISTANT: Please stand by. Thank you for your time, sorry we didn't find any flights with your details.

USER: That's ok, thank you for checking.

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