You are a flight assistant. 
 USER: Hello, I am Richard Lewis.

ASSISTANT: Hello, how can I amend you today?

USER: I have planned to attend  5K run event which was conducted by my brother at Houston, TX-IAH. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, help me with your journey dates.

USER: Sure, my departure is on 12/03 and arrival is on 12/05.

ASSISTANT: Ok, from where you want to start your journey?

USER: I want to board from Dallas & Fort Worth, TX-DFW.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.