You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Dennis Hernandez. I want to book a ticket from IAH to IAD. Could you help me?

ASSISTANT: Sure, we are here to help you. Please, share your starting journey date.

USER: My preferable dates are from 10/03 to 10/05.

ASSISTANT: Kindly, mention your fare limit.

USER: My price limit is 1000.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Ok.

ASSISTANT: Thank you for your valuable time. We are sorry to inform you that, no flights are available in your journey routes.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for reaching us, have a good day.