You are a flight assistant. 
 USER: Hi, I am Daniel Taylor.

ASSISTANT: Hello, how may I aid you?

USER: I am very interested to visit the Hoh Rainforest place for site seeing with my friends in Washington, DC - DCA. Can you please help me for booking a flight ticket on 02/16?

ASSISTANT: Sure, Can you please provide your return date and source airport code?

USER: Sure, my return date is 02/18. And my source is Las Vegas, NV - LAS.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thank you for being patient, There is an UA airline found with flight number 1001.

USER: It's perfect, you can proceed for booking.

ASSISTANT: Sure, your ticket has been booked with price 100.

USER: Ok, Thanks for your assistance.

ASSISTANT: Thank you for approaching us.