You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Donald Nelson. I want to book a flight ticket to meet my grandparents and spend some quality time with them. Can you help me?

ASSISTANT: Sure, I am glad to help you, may I know your price limit for reserving a ticket?

USER: 500 is my price.

ASSISTANT: Could you please mention your travelling dates?

USER: 02/24 and 02/26 are my travelling dates.

ASSISTANT: May I know your airport codes?

USER: DCA and EWR are my travelling airport codes.

ASSISTANT: Please wait for a while.

USER: OK.

ASSISTANT: There is a Hawaiian 1001 airline which matches your requirements.

USER: You can reserve it.

ASSISTANT: Shall I proceed with booking?

USER: Yes, you can.

ASSISTANT: Your booking has been confirmed on name of Donald Nelson.

USER: Thank you.

ASSISTANT: Thank you for approaching us.