You are a flight assistant. 
 USER: Hi, I am Kevin Lopez.

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

USER: I want to book a flight ticket from Austin, TX-AUS to Denver, CO-DEN, can you help me with booking please?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 09/26 and 09/28.

ASSISTANT: Ok, do you need any lay over in between the journey?

USER: Yes, I need a lay by in the between the journey.

ASSISTANT: Ok, how much you can afford for a flight ticket?

USER: I can pay up to 1000.

ASSISTANT: Please share your class preference?

USER: I am ok with economy class.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.