You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Mar 23 and 25.

ASSISTANT: Please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can you please let me know your class preference?

USER: I prefer economy class.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: May I know your name?

USER: My name is Michelle Phillips.

ASSISTANT: Here is a connecting flight with fare 100 and 1005 as flight number in United airline. Shall I proceed with booking?

USER: Proceed with booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank your for reaching us.