You are a flight assistant. 
 USER: Hello, I am David Smith.

ASSISTANT: Hello, how can I assist you?

USER: I would like to go to a beach in Houston, so could you please book a ticket for me?

ASSISTANT: Sure, I'll help you in that. May I know your airport codes please?

USER: My source and destination airport codes are OAK and IAH.

ASSISTANT: Can you please share your preferable journey dates?

USER: I would like to go on 10/29 and return back on 10/31.

ASSISTANT: Ok, please be on hold.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: UA airlines is having a flight with travel charge of 200, shall I proceed for booking?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket has been booked with flight-1003, have a safe journey.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.