You are a flight assistant. 
 USER: Hello. I am Cynthia Carter.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a flight ticket from IL-ORD to reach CA-LAX?

ASSISTANT: Sure, please share your planned travel dates.

USER: My travelling dates are from June 09 to June 11.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: My departure time is evening.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we don't have any flight available which departs in the evening.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for connecting us.