You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am Ruth Gonzalez. I want to meet my manager at Chicago, can you please book my flight ticket from IAD to ORD?

ASSISTANT: Sure, may I know when you are planning to travel?

USER: Sure, I have to depart in the evening on June 2nd and I have to return back on June 4th.

ASSISTANT: Is there any airline preference for you?

USER: I am comfortable with any airlines.

ASSISTANT: Do you want to fly with economy class or business class?

USER: Any class is fine for me.

ASSISTANT: Please give me a moment.

USER: Sure, please check  for the single connection flight.

ASSISTANT: Unfortunately we did not find any flight on your matching information.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.