You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Please book me a ticket from OAK to DTW to meet my family.

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: I have planned to travel on Feb 08th and return on Feb 10th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I like connecting flight.

ASSISTANT: Is there any airline preference?

USER: No, but I want to depart at afternoon time.

ASSISTANT: May I know your name please?

USER: Myself Frank Martinez.

ASSISTANT: I am sorry to say that there is no flight found under your detail.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.