You are a flight assistant. 
 USER: Hello, I am William Collins.

ASSISTANT: Hello, How may I help you?

USER: I am planning to go for hummer tour at Las Vegas, NV - LAS. Can you help me with book a ticket from Washington DC - DCA?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please forward your travelling dates.

USER: My travelling dates are 02/22 to 02/24.

ASSISTANT: Do you have any restriction on price?

USER: My price limit is 200.

ASSISTANT: Ok. Thanks for sharing the details, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, We found a Hawaiian airline with a fare of 100. Flight number is 1007.

USER: Please proceed with booking.

ASSISTANT: Your reservation is done successfully.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us, Have a nice day.