You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Ruth Gonzalez. I want to book a flight ticket from CA-OAK to TX-DFW. Can you help me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you. 06/02 and 06/04 are my travelling dates.

ASSISTANT: Sorry, there are no flights found.

USER: No issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you .