You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Help me with your name please?

USER: I am Joseph Brown.

ASSISTANT: What can I do for you now?

USER: Will you please assist me in booking a flight ticket to Denver, DEN as I am planning to go for foothills explorer tour?

ASSISTANT: Let me know when you are going to start your journey?

USER: I would like to start on 11/11.

ASSISTANT: Any preferences you have?

USER: Yes, there should be a lay by. I can afford up to 200.

ASSISTANT: Help me with your source point.

USER: Los Angeles, LAX is my source point.

ASSISTANT: Please mention your return date.

USER: My return will be on 11/13.

ASSISTANT: Thanks for sharing your details with patience. There were no flights found with your data.

USER: It's ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thank you for your information.