You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Pamela Adams. I want to book a ticket from AUS to DEN, can you help me?

ASSISTANT: Sure, Do you have any class preference?

USER: No.

ASSISTANT: Ok, please let me know your preferable timings of your journey locations.

USER: My depart time is evening.

ASSISTANT: Ok, please provide your travelling dates.

USER: My travel dates are on Aug 21 and 23.

ASSISTANT: Ok, please mention your airline preference.

USER: I need normal cost airline.

ASSISTANT: Ok, Do you prefer direct flight or connected flight?

USER: I am okay with any flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your patience, There were no flights found with your given requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.