You are a flight assistant. 
 USER: Hello, I am Jennifer Evans.

ASSISTANT: Hello, what kind of help get from me?

USER: I would like to visit Death Valley Adventure at Denver, can you please book me a ticket?

ASSISTANT: Sure, can I have your source and destination points please?

USER: I would like to fly from Las Vegas, LAS to Denver, DEN.

ASSISTANT: May I know your preferred dates of travel?

USER: I would like to travel on 02/01 and 02/03.

ASSISTANT: Let me know your fare limit please?

USER: I can afford up to 1000.

ASSISTANT: Sorry to say that there is no flights available on given dates from your source.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for reaching us.