You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to Smile travel agency. How can I assist you today?

USER: I want to see Lake Merritt with my best friend at Oakland, could you please help me out?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 05/17 to 05/19.

ASSISTANT: Will you please help me with your take off and landing airport codes?

USER: My origin airport code is PHX and my destination airport code is OAK.

ASSISTANT: Wait a while, I will get back to you with the best flight service details.

USER: Sure.

ASSISTANT: Sorry to inform you that, all flights are reserved on those dates.

USER: Ok, no problem.

ASSISTANT: May I know your good name for our documentation process?

USER: Sure, my name is Robert Jackson.

ASSISTANT: Do you need any other help from us?

USER: No, thank you for your help.

ASSISTANT: Fine Robert, thank you so much for choosing us to serve you.