You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

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

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 27 and 29 of July.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you have specific travel timings?

USER: I am ok with any timing.

ASSISTANT: Would you like a lay off in your journey?

USER: I need a connecting flight.

ASSISTANT: Let me know in which class will you prefer to travel?

USER: I am fine with any class.

ASSISTANT: Ok, please mention your name to proceed further.

USER: I am Margaret Garcia.

ASSISTANT: Frontier Airlines has a connecting flight with number 1016 for fare 100, shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket is reserved in economy class.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.