You are a flight assistant. 
 USER: Hello, I am Elizabeth Brown.

ASSISTANT: Hello, how may I abet you?

USER: Can you please book me a ticket with the fare of 500?

ASSISTANT: Sure, let me know your journey dates?

USER: I would like to leave between 11/04 and 11/06.

ASSISTANT: Please mention your airport codes?

USER: My airport codes are from SEA to LAS.

ASSISTANT: Please wait, I will revert to you.

USER: Ok.

ASSISTANT: I found a flight with fare of 200 from an UA airline. Flight number 1016.

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket is booked.

USER: Thank you so much for your service.

ASSISTANT: Thanks for approaching us.