You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Edward Anderson. I would like to book a flight ticket from CLT to IAD, can you please help me to book a flight ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my travelling dates are Nov 10 and Nov 12.

ASSISTANT: Do you have any specifications?

USER: My return time is morning.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: No problem, thank you for your information.

ASSISTANT: Welcome, have a great day.