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

ASSISTANT:  Hello, how can I best oblige you now?

USER: Please book me a flight ticket from IAH to HOU as  need to submit my records.

ASSISTANT: Please, share your fare limit.

USER: I can pay up to 5000.

ASSISTANT: May I know your travel dates to search a flight for you?

USER: I would start on 01/123 and return on 01/25.

ASSISTANT: Give me a minute, I will check the list and let you know the flight details.

USER: OK.

ASSISTANT: No flights found on your journey routes.

USER: It's Ok, thanks for your assistance.

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