You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Ryan Collins. Can you help me in booking from SFO to IAH, as there is a sports meet to attend?

ASSISTANT: May I know your desired travel dates please?

USER: MY trip dates are 01/06 to 01/08.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for opting us.