You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to visit my friend home at Oakland, can you please book me a ticket from DTW to OAK?

ASSISTANT: Sure, can you please let me know your planned dates of travel?

USER: My preferable journey dates are from 07/28 to 07/30.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: I found a flight that UA airline with connection 2 as per details, can I proceed?

USER: Please check for 1 connection limit.

ASSISTANT: Sorry, no flights as per your details.

USER: Ok, please don't book my ticket.

ASSISTANT: Ok, that's fine.

USER: Thank you for providing information.

ASSISTANT: My pleasure, have a nice day.

USER: My name is Melissa Green.

ASSISTANT: Green, happy journey.