You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: My name is Amy Parker. Please help me to book a flight ticket from IAD to ORD.

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are from Mar, 11 to Mar, 13.

ASSISTANT: Do you have any preferences for this trip?

USER: I need to depart in the morning and I need a business class to fly.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.