You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I love playing poker and would like to go to poker place at Las Vegas. Can you help me in booking a ticket?

ASSISTANT: That's really appreciable, can you please let me know your respective airports codes?

USER: My journey is from IAH to LAS.

ASSISTANT: Ok, could you please help me with your dates of journey?

USER: I have planned my journey on dates 09/24 and 09/26.

ASSISTANT: May I know your name please for further processing?

USER: My name is Larry Parker.

ASSISTANT: Sorry Larry, there is no flights are available as per your requirement.

USER: That's fine, I will find other way out. Thank you for the information.

ASSISTANT: You are welcome always.