You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Nicole Perez. I want to attend Science festival at Houston, HOU. Can you help me in booking a flight ticket with a connecting flight?

ASSISTANT: Sure. May I know which airport do you prefer to leave from?

USER: I want to leave from Denver, DEN.

ASSISTANT: Do you need a flag stop in between?

USER: I already mentioned.

ASSISTANT: Please let me know your travelling dates.

USER: My travelling dates are from 10/28 to 10/30.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for giving your details. It's unfortunate that there are no flights available at this moment on your requested dates.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for consulting us.