You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to visit Las Vegas, will you help me in booking the flight ticket from HOU to LAS?

ASSISTANT: Sure, may I know the planned travel dates?

USER: My preferable journey dates are Dec 24 and Dec 26.

ASSISTANT: Please provide me the specifications.

USER: I prefer to travel in connecting flight.

ASSISTANT: May I know the name?

USER: Myself Rachel Taylor.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.