You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your good name please?

USER: My name is Rachel Lopez.

ASSISTANT: Yes Rachel, what can I do for you?

USER: I have a concert in Seattle, can you book a ticket from HOU to SEA?

ASSISTANT: Sure Rachel, may I know your travelling dates please?

USER: Sure, my travel dates are 07/21 and 07/23.

ASSISTANT: Ok, please wait. The flight number 1003 of UA airline is available. Can I book this flight ticket?

USER: You can proceed.

ASSISTANT: Ok. Your reservation process is completed.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.