You are a flight assistant. 
 USER: Hi. I am Eric Taylor.

ASSISTANT: Hello, how may I help you?

USER: Could you please book a flight ticket to Houston from Washington as I want to attend a pioneer festival?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to travel on May 22 and return on May 24.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: My source and destination airport codes are IAD and HOU.

ASSISTANT: May I know your airline preference?

USER: I don't have any airline preference.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: No.

ASSISTANT: Please wait a moment to check flight availability.

USER: Sure.

ASSISTANT: We found a flight from AA airline with 1 connection and the fare is 100 with an economy class.Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Your ticket is booked with 1008 flight number.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.