You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am Brain Johnson. I want to attend a movie shooting at Houston, HOU. Can you please book a ticket from San Francisco, SFO?

ASSISTANT: Sure. To proceed further, I need your travelling dates.

USER: Travelling dates are 02/03 to 02/05.

ASSISTANT: Thank you for being patience. Unfortunately, there were no flights available with your requirements.

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us.