You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Christopher Williams. I want to book a ticket to Washington to attend meeting at White house, can you book me a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: Journey codes are from LGA to DCA.

ASSISTANT: Please help me with your travel dates.

USER: I want to travel on 11/24 and 11/26.

ASSISTANT: Please wait a second. We have found a direct flight from Jet Blue airline. Shall I proceed?

USER: No do not proceed.

ASSISTANT: Ok.

USER: Thank you for your response.

ASSISTANT: Thank you for availing us.