You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know your good name, please?

USER: Myself Benjamin Collins. I want to visit Houston Zoo in Houston, can you do the reservation for me?

ASSISTANT: Definitely, please help me with your take off and landing airport codes.

USER: I want to take off from SEA and land to HOU.

ASSISTANT: Fine, on which dates are you preferring to travel?

USER: I am planning to travel on 07/01 and return on 07/03.

ASSISTANT: I am very happy to say that, I found a flight for you from UA airline with number 1004. Shall I book the ticket?

USER: Yes, please.

ASSISTANT: I have booked your ticket successfully and the travelling charge for you is 100 only. Have a safe journey.

USER: Thank you for booking.

ASSISTANT: Thank you for using our service to help you in booking.