You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Rodriguez here.

ASSISTANT: How may I help you?

USER: I want to meet my brother on his birthday, so please book my ticket from IAD to IAH.

ASSISTANT: Sure, I will help you. Could you please provide me your travel dates?

USER: My itinerary dates are Jan 26 and Jan 28.

ASSISTANT: Ok, do you prefer for economy class or business class?

USER: I have no preferences.

ASSISTANT: There is a flight available with UA airlines and the ticket fare is 100 only. Is that ok for you?

USER: Please book my ticket.

ASSISTANT: Your ticket is booked successfully and your flight number is 1003.

USER: Thank you for your service.

ASSISTANT: You are welcome and thank you for reaching us.