You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you today?

USER: I am Timothy Thomas. I would like to go for wedding shopping at Las Vegas, can you please book a flight ticket to LAS?

ASSISTANT: Sure, kindly mention your travel dates?

USER: My travelling dates are from 10/16 to 10/18.

ASSISTANT: Can you please provide me your airport code?

USER: I will board on Houston, IAH as it is my nearest airport.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: It's ok. Thank you for the information.

ASSISTANT: Thanks for reaching us, have a good day.