You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to book a flight ticket from LAS to HOU to attend meeting.

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My trip dates are Aug 25 to Aug 27.

ASSISTANT: May I know your name please?

USER: Emily Nelson.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in connecting flight.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.