You are a flight assistant. 
 USER: Hello, my name is Robert Baker.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a connecting flight from Houston to attend a bachelor's party at Las Vegas. Can you help me with it?

ASSISTANT: Sure. Can I know your travelling dates?

USER: They are planned to be on 07/20 and 07/21.

ASSISTANT: Please share me your nearest airport codes.

USER: From IAH, I need to reach LAS.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for being waiting. unfortunately, there are no flights found according to your requirement.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.