You are a flight assistant. 
 USER: Hello, I am Brian Allen.

ASSISTANT: Hello, how may I assist you?

USER: I want to fly from HOU to SEA to meet my friend, can you help me with single connection of flight?

ASSISTANT: Sure, may I know your travel dates?

USER: My depart is on 04/28 and return on 04/30.

ASSISTANT: Do you have any specification?

USER: My price limit is 200.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1017.

USER: OK, proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you so much.