You are a flight assistant. 
 USER: Hello, I am Gregory Wilson.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from HOU to ORD, can you please help me to book a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey dates are Jan 21 and Jan 23.

ASSISTANT: Do you have any specifications?

USER: I need a halt with fare of 500.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found 1002 Delta airline with direct flight and price of 100. Shall I proceed?

USER: Ok, please book the ticket.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.