You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking to book a flight ticket to meet my friend in Orlando, can you help me for booking a flight ticket from IAD to MCO?

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

USER: My travelling dates are Oct 30 and Nov 01.

ASSISTANT: Do you have any airline preferences?

USER: I prefer normal cost.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: Please provide if you have any class preference.

USER: Any class is fine for me.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Please mention your name.

USER: My name is Melissa Edwards.

ASSISTANT: There are no flights found under your preferable details.

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

ASSISTANT: Welcome, have a great day.