You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am David Smith.

ASSISTANT: Nice to meet you David Smith.

USER: I want to travel for Houston.So, I want to book my ticket from SEA to IAH. Will you please help me in booking my ticket?

ASSISTANT: Sure, could you please provide your trip dates?

USER: Sure, my preferable dates are from 08/21 to 08/23.

ASSISTANT: Please wait a moment, I will let you know.

USER: Ok.

ASSISTANT: Your required details are matched with one flight. Shall I proceed?

USER: Yes, proceed with the booking.

ASSISTANT: Ok. Your flight ticket is booked David Smith.

USER: Thank you for your service.

ASSISTANT: You are welcome David Smith.