You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Virginia Smith. I would like to book a flight ticket from EWR to OAK, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: Sure, my trip dates are Oct 19 and Oct 21.

ASSISTANT: Is there any class limit?

USER: I need a connecting flight. I am comfortable to travel in any class.

ASSISTANT: Is there any more specifications in your journey?

USER: My departing time is evening.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.