You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me in booking flight ticket with my name Sandra Green, from Washington, DC - DCA?

ASSISTANT: Sure, I am here to help you. When are you planning to make your journey?

USER: Thanks for responding. I have planned to travel on 12/07 & reutrn on 12/09.

ASSISTANT: Please let me know your destination airport code?

USER: My landing is at Los Angeles, CA - LAX, Los Angeles.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a flight with a stopover. My ticket fare should not exceed 200.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT:  Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, not a problem. Thanks for your kind information.

ASSISTANT: Thank you for reaching us.