You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket from TX to visit Central Hall in DC, can you please help me to book a flight ticket with single connection?

ASSISTANT: May I know your trip dates?

USER: Sure, I would like to depart on 01/25 and my return date will be on 01/27.

ASSISTANT: Do you prefer any specifications?

USER: I prefer to fly in a connecting flight.

ASSISTANT: May I know your name?

USER: I am Carol Brown.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My boarding and landing airport codes are IAH and IAD.

ASSISTANT: Hawaiian airlines providing a connected flight in economy class.

USER: Ok, please proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you.