You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Mitchell.

ASSISTANT: How can I help you today?

USER: I am planning to go for a twilight tour with my friends, can you please help me in booking a ticket with connecting flight?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Do you prefer any specifications?

USER: Price should not exceed 500.

ASSISTANT: May I know your journey dates?

USER: My planned journey dates are 06/25 and 06/27.

ASSISTANT: Please specify your airport codes?

USER: I want to leave from Houston, IAH to reach Washington, IAD.

ASSISTANT: There is a flight available with Delta airline, flight 1002 with fare 100. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for connecting us.