You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Actually, I am looking for a flight with connection 0, because it is emergency to travel, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please provide your airport codes?

USER: Sure, I want to travel from HOU to LAS.

ASSISTANT: Ok, may I know your planned dates that you like to travel?

USER: I want to take off from Houston on 09/15 and please book a return ticket on 09/17.

ASSISTANT: please give a minute, I will check with the available flights and revert back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting.

USER: No problem.

ASSISTANT: Sorry, there is no flight available on your requested dates. May I know your good name for further proceedings?

USER: Sure, my name is Janet Green. Anyway, thank you for the information.

ASSISTANT: Most welcome. Have a great day.