You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Cynthia Smith. Can you please help me to reserve a flight ticket from Washington? Because I have a company in Houston so, to discuss some issues I have to go there.

ASSISTANT: Sure, I am here to help you. Can you please let me know your travel dates?

USER: Thank you. My travel dates are 05/19 and 05/21.

ASSISTANT: Ok, please provide me your source and destination airport codes.

USER: The source and destination airport codes are IAD and IAH.

ASSISTANT: Smith, please be on hold for a while.

USER: Ok, I will wait for your response.

ASSISTANT: There is a flight-1004 available with economy class in Spirit airlines and the ticket fare is 100 only. Shall I book the ticket for you?

USER: Yes, I am ok with this flight to travel. Please go ahead and book the flight ticket for me.

ASSISTANT: Smith, your ticket is confirmed and have a safe flight.

USER: Thanks a lot for your assistance in booking a flight ticket.

ASSISTANT: Thank you very much for choosing us.

USER: You are welcome.