You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Sharon Martinez. I have to fly from Houston with my childhood friends, to celebrate the arts festivals and enjoy by watching the different types of arts in Washington.

ASSISTANT: Sure, please provide me your journey details?

USER: I would like to travel on 09/01 and arrival on 09/03. My travel starts from TX-HOU and return on DC-IAD.

ASSISTANT: Sorry, no flights are available.

USER: Ok, no issue. Thank you for your information.

ASSISTANT:  Thank you for availing us.