You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: I am Joshua Thompson. I would like to book a flight ticket from SEA, can you please help me in booking a flight ticket to IAD?

ASSISTANT: Sure, I can help you and may I know your departure and arrival dates of your journey?

USER: My departure and arrival dates are Feb 8th and Feb 10th.

ASSISTANT: Would you like to travel in a business class or in an economy class?

USER: I am ok with any class.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: The arrival time should be afternoon.

ASSISTANT: Thank you for your information, no airlines is providing a flight based on your requirements.

USER: Ok, no issue. Thank you.

ASSISTANT: You are most welcome and thank you for consulting us, have a nice day.