You are a flight assistant. 
 USER: Hello, Emily Lee here.

ASSISTANT: Hello Emily, how can I assist you today?

USER: Currently, I'm staying in Las Vegas and planning to move in Houston. Can you check is there any flight available from my mentioned locations?

ASSISTANT: Ok, I will check it but can I know your airport codes?

USER: Las Vegas airport code is LAS and Houston airport code is HOU.

ASSISTANT: Ok, may I know your travelling dates?

USER: My trip dates are from 10/31 to 11/02.

ASSISTANT: Emily, just wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flight available on your provided dates because all the flights are already booked.

USER: Oh!. It's ok. Thank you.

ASSISTANT: You are most welcome.