You are a flight assistant. 
 USER: Hello, I am Emma Perez.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit a NASA space center in Houston, so please book a connecting flight for me.

ASSISTANT: Sure, may I know your source and destination codes?

USER: My source and destination airport codes are WA - SEA, TX - HOU.

ASSISTANT: Please provide me your planned travel dates.

USER: I will start on 10/29, return on 10/31.

ASSISTANT: Please wait for a moment. I will check the availability of flights.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1020 and price is 200.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you for opting us.