You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to book ticket from IAH to IAH, can you help me?

ASSISTANT: Sure, please provide your journey dates.

USER: My trip dates are 02/28 and 03/01.

ASSISTANT: May I know your name please?

USER: Myself Ronald Robinson.

ASSISTANT: Ronald, no flights has been found on your journey dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.