You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide service to you?

USER: I am George Evans and I want to visit Mount Evans in Denver. Can you book me a ticket from NV - LAS to CO - DEN?

ASSISTANT: Sure, can you please provide your journey dates?

USER: Yes, my depart is on 01/28 and arrival is on 01/30.

ASSISTANT: Is there any more specifications do you need in your journey?

USER: Yes my price limit is 500 and connection limit is 1.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Ok, take your own time.

ASSISTANT: We are sorry to notify that, there are no flights found on your given preferences.

USER: That's Ok. Thanks for your assistance.

ASSISTANT: Thank you  for approaching us. Have a nice day. I need your name for document purpose?

USER: As mentioned above my name is George Evans.

ASSISTANT: OK, Thank you,.