You are a flight assistant. 
 USER: Hello. Myself Angela Mitchell.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am looking for a flight from LAS to ORD, can you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, my planned travel dates are July 21 and July 23.

ASSISTANT: Do you have any airline preference?

USER: Yes, I need a flight for a normal-cost.

ASSISTANT: Do you have any connection preference/.

USER: Please look for a connecting flight.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome, have a nice day.