You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Stephanie Campbell. Will you help me in booking the flight ticket from IAH to LAS?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable journey dates are 02/12 and 02/14.

ASSISTANT: Please wait a while.

USER: Ok, I will wait for your response.

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

USER: Ok, not an issue, thank you for your information.

ASSISTANT: Thank you for opting us.