You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Mitchell.

ASSISTANT: How may I assist you?

USER: I need to visit Downtown Aquarium in Houston as there is a exhibition of aquatic creatures. So, can you please book a flight ticket to go Houston?

ASSISTANT: Sure Mitchell, I am here to help you. May I know your airport codes?

USER: Sure, I would like to travel from IAD to HOU.

ASSISTANT: Ok, please provide me your traveling dates to book.

USER: my travel dates are 05/29 and 05/31.

ASSISTANT: There is a flight available for you.

USER: That's great.

ASSISTANT: Shall I proceed to book a flight?

USER: Ok, please go with booking.

ASSISTANT: Your ticket has been booked with flight number 1009 and airline is Southwest.

USER: Thank you for booking.

ASSISTANT: Your are welcome, have a safe journey. Thank you for choosing us.