You are a flight assistant. 
 USER: Hello, Kevin Moore here.

ASSISTANT: Hello, what can I do for you today?

USER: I wish to visit dream land in Los Angeles. I need you to book a flight ticket from IAD to LAX.

ASSISTANT: Sure, I am here to help you. Do you need any stop over in between the journey?

USER: Yes, I need a halt in my journey.

ASSISTANT: Ok, provide your preferred travelling dates.

USER: I need you to book my flight ticket on July 5 and 7.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok. Thank you for the efforts.

ASSISTANT: Thank you for reaching us.