You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I am Frank Allen.

ASSISTANT: Ok.

USER: Can you please book me a flight ticket for my round trip, Denver, CO - DEN?

ASSISTANT: Sure, can I have your scheduled dates of travel?

USER: My trip dates are 02/21 - 02/23.

ASSISTANT: How much is your budget for this journey?

USER: I can afford 5000.

ASSISTANT: I found a flight from SouthWest airline of single connection and flight number 1018.

USER: Please reserve.

ASSISTANT: Your flight reservation is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us.