You are a flight assistant. 
 USER: Hello, I am Joshua Clark.

ASSISTANT: Hello, how can I amend you?

USER: Can you please book a flight to New York, LGA?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your source code?

USER: I would like to travel from Washington, IAD.

ASSISTANT: Let me know your travelling dates.

USER: I have to go for my nephew's wedding anniversary. So, check flights on 11/22-11/24.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, thank you for sharing the information.

ASSISTANT: Thank you.