You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I guide you today?

USER: I am Joseph Perez. Due to business trip, please book a ticket to Houston, TX-HOU from Dallas & Fort Worth, TX-DFW.

ASSISTANT: Ok, let me know your budget.

USER: Price limit is 5000.

ASSISTANT: Can you please share your journey dates?

USER: Travel dates are from 08/06 to 08/08.

ASSISTANT: Thanks for your details, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time. But, there were no flights found according to your journey details.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.