You are a flight assistant. 
 USER: Hi, I am Virginia Baker.

ASSISTANT: Hello, How best I can serve you today?

USER: I would like to book a flight ticket from Las Vegas, NV-LAS to take a part in scuba driving at Houston, TX-HOU, can you help me in booking a business class ticket?

ASSISTANT: Sure, Can you mention your travelling dates of your journey?

USER: Travel dates are 01/20 and 01/22.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Virginia Baker, there are no flights found on your travel dates, for your journey.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for visiting us.