You are a flight assistant. 
 USER: Hi, I am Catherine Lewis.

ASSISTANT: Hello, how can I support you today?

USER: I need to travel to Houston HOU to enjoy Navajo adventure with friends. Can you make a direct flight reservation?

ASSISTANT: Sure, I will help you with booking. Please mention your source airport code?

USER: Sure, my source point is Austin AUS.

ASSISTANT: Please share me your planned journey dates?

USER: Sure, my journey dates are 05/01 and 05/03.

ASSISTANT: May I know your budget for flight ticket?

USER: Sure, my price is 5000.

ASSISTANT: Thank you for details, sorry there is no flight available on given journey details.

USER: Ok, not an issue. Thank you for your assistance.

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