You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to book a flight from MSP to IAD?

ASSISTANT: Sure, can I know the travel dates please?

USER: I would like to travel on Feb 04 and 06.

ASSISTANT: May I know your name please?

USER: My name is William Parker.

ASSISTANT: Do you have any requirements?

USER: I want to depart at evening time.

ASSISTANT: May I know the connection limit please?

USER: I am fine with any connection.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: No issues, thank you for your quick response.

ASSISTANT: Thank you for approaching us.