You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Kathleen Hernandez.

ASSISTANT: Please let me know, How can I be your helping hand?

USER: I want to go for Hummer Tour to Las Vegas, LAs. Can you help me in booking from Oakland, OAK?

ASSISTANT: Sure, I can help you in that. I need your specified dates, that you wish to travel and return?

USER: Thank you. My travelling dates are from 07/10 to 07/12.

ASSISTANT:  Ok, Please wait for a while.

USER: Sure.

ASSISTANT:  Thanks for waiting.

USER: Ok.

ASSISTANT: Sorry Kathleen, there are no flights found for your journey on your specified dates.

USER: Ok, No issues. Thank you.

ASSISTANT: Thanks for approaching us.