You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you now?

USER: I am Catherine Lopez, can you please help me in booking my flight ticket to IAD from OAK?

ASSISTANT: Sure, please share me your planned journey dates?

USER: Sure, my planned travel dates are July 7 and July 9.

ASSISTANT: May I know your depart and return flight timing?

USER: I need to return to my location in the evening.

ASSISTANT: Please mention your connection limit?

USER: I need a connecting flight for my journey.

ASSISTANT: May I know your class preference?

USER: Yes, I need an economy class for my journey.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us, we hope see you again.