You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am planning to visit Houston Zoo with my friends on 02/09.Can you please help me out?

ASSISTANT: Sure, I can help you on that.

USER: Thank you.

ASSISTANT: Could you please provide your nearest airport codes for booking?

USER: Sure, my location is from NV-LAS and the nearest location is TX-IAH.

ASSISTANT: Ok, may I know your preferable dates of travelling?

USER: The preferable dates are from 02/07 to 02/09.

ASSISTANT: On whose name I have to book this flight ticket?

USER: The ticket should be on the name of Carolyn Edwards.

ASSISTANT: Ok Edwards, please hold on a moment to check the availability of flights and I will revert you.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there are no flights available with your requested dates of travelling.

USER: Ok, no problem.

ASSISTANT: Would you like to ask us anything else?

USER: No, thank you for your information.

ASSISTANT: Ok, thank you for reaching us, have a great day.