You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: Please provide a ticket from Houston, TX-HOU to Philadelphia, PA-PHL, as it's business trip.

ASSISTANT: Sure, do you have any price limit?

USER: Ticket price limit is 500.

ASSISTANT: May I know your journey dates?

USER: 07/25 to 07/27 are travel dates.

ASSISTANT: May I know your good name for further process?

USER: I'm Edward Roberts.

ASSISTANT: No flights found on your journey locations.

USER: Thanks for the help.