You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Death Valley Adventure, can you help me with booking from LGA to LAS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are Nov 21 and Nov 23.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Is there any class preference?

USER: Yes, I want to travel in economy class.

ASSISTANT: Please provide your name.

USER: I am Margaret Davis.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, I would like to prefer normal cost airline.

ASSISTANT: Ok. Sorry, there were no flights found with normal-cost.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.