You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Mitchell here.

ASSISTANT: How can I aid you now?

USER: I am planning to meet my friend in Washington. Can you please help me with booking a flight ticket from DFW to IAD?

ASSISTANT: Sure, may I know your travel dates please?

USER: My planned travel dates are from June 13 to June 15.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight in my journey.

ASSISTANT: May I know about your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other preferences?

USER: My depart time is afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, we have not found any flights running on your routes.

USER: Not an issue, thank you for the information.

ASSISTANT: Thanks for choosing us.