You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I am planning to visit Detroit, can you please book me a ticket from OAK to DTW?

ASSISTANT: Ok, shall I know your travellnig dates?

USER: My preferable journey dates are from 10/30 to 11/01.

ASSISTANT: Ok, please wait.

USER: Sure, take your own time.

ASSISTANT: May I know your name?

USER: My name is Katherine Johnson.

ASSISTANT: Sorry, I did not find any flight ticket with your preferable dates.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for reaching us.