You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I am looking to book a flight ticket from PHL to IAD. Can you help me for that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your travel dates?

USER: My travelling dates are July 04 and July 06.

ASSISTANT: Do you prefer a connection in between your journey?

USER: I prefer to book a single connecting flight.

ASSISTANT: In which class would you like to travel?

USER: Any class is fine for me.

ASSISTANT: Do you have any preferable timings to travel?

USER: My depart time is morning and return time is afternoon.

ASSISTANT: Is there any airline preference?

USER: Any airline is fine for me.

ASSISTANT: To proceed further, can I know your name?

USER: My name is Kimberly Robinson.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Welcome.